Evolution of human consciousness?

What does Bahá’u’lláh hold to be the goal of the evolution of human consciousness?
Within the context of the history of civilization, the objective of the succession of divine Manifestations has been to prepare human consciousness for the race’s unification as a single species, indeed as a single organism capable of taking up the responsibility for its collective future: “He Who is your Lord, the All-Merciful,” Bahá’u’lláh says, “cherisheth in His heart the desire of beholding the entire human race as one soul and one body.”
Not until humanity has accepted its organic oneness can it meet even its immediate challenges, let alone those that lie ahead: “The well-being of mankind,” Bahá’u’lláh insists, “its peace and security, are unattainable unless and until its unity is firmly established.”

Bahá’u’lláh, Bahá'í International Community.

Whoso cleaveth to justice, ...

Whoso cleaveth to justice, can, under no circumstances, transgress the limits of moderation. He discerneth the truth in all things, through the guidance of Him Who is the All-Seeing. The civilization, so often vaunted by the learned exponents of arts and sciences, will, if allowed to overleap the bounds of moderation, bring great evil upon men.

Thus warneth you He Who is the All-Knowing. If carried to excess, civilization will prove as prolific a source of evil as it had been of goodness when kept within the restraints of moderation. Meditate on this, O people, and be not of them that wander distraught in the wilderness of error. The day is approaching when its flame will devour the cities, when the Tongue of Grandeur will proclaim: “The Kingdom is God’s, the Almighty, the All-Praised!”
 All other things are subject to this same principle of moderation. Render thanks unto thy Lord Who hath remembered thee in this wondrous Tablet. All-Praise be to God, the Lord of the glorious throne.

Gleanings From the Writings of Bahá’u’lláh P. 343

If ye become aware of ...

If ye become aware of a sin committed by another, conceal it, that God may conceal your own sin. He, verily, is the Concealer, the Lord of grace abounding.
 O ye rich ones on earth!If ye encounter one who is poor, treat him not disdainfully. Reflect upon that whereof ye were created. Every one of you was created of a sorry germ. It behoveth you to observe truthfulness, whereby your temples shall be adorned, your names uplifted, your stations exalted amidst men, and a mighty recompense assured for you before God.

Bahá'u'lláh: The Summons of the Lord of Hosts P.80

Say: My army is My ...

 "Say: My army is My reliance on God;
My people, the force of My confidence in Him. My love is My standard,
 and My companion the remembrance of God, the Sovereign Lord of all, the Most Powerful,
the All-Glorious, the Unconditioned."

Gleanings From the Writings of Bahá’u’lláh, 

Great indeed is this Day!

Great indeed is this Day! The allusions made to it in all the sacred Scriptures as the Day of God attest its greatness.;The soul of every Prophet of God, of every Divine Messenger, hath thirsted for this wondrous Day. All the divers kindreds of the earth have, likewise, yearned to attain it. No sooner, however, had the Day Star of His Revelation manifested itself in the heaven of God’s Will, than all, except those whom the Almighty was pleased to guide, were found dumbfounded and heedless.

O thou that hast remembered Me! The most grievous veil hath shut out the peoples of the earth from His glory, and hindered them from hearkening to His call. God grant that the light of unity may envelop the whole earth, and that the seal, “the Kingdom is God’s”, may be stamped upon the brow of all its peoples."

 Gleanings From the Writings of Bahá’u’lláh, Pages 10-11

O FRIEND!
 In the garden of thy heart plant naught but the rose of love, and from the nightingale of affection and desire loosen not thy hold. Treasure the companionship of the righteous and eschew all fellowship with the ungodly.

 .ای دوست در روضه قلب جز گل عشق مکار و از ذيل بلبل حبّ و شوق دست مدار * مصاحبت ابرار
را غنيمت دان و از مرافقت اشرار دست و دل هر دو بردار

حضرت بهاءالله    کلمات مکنونۀ

RID thou thyself of all attachments ...

RID thou thyself of all attachments to aught except God, enrich thyself in God by dispensing with all else besides Him, and recite this prayer:

Say: God sufficeth all things above all things, and nothing in the heavens or in the earth or in whatever lieth between them but God, thy Lord, sufficeth. Verily, He is in Himself the Knower, the Sustainer, the Omnipotent.
Regard not the all-sufficing power of God as an idle fancy. It is that genuine faith which thou cherishest for the Manifestation of God in every Dispensation. It is such faith which sufficeth above all the things that exist on the earth, whereas no created thing on earth besides faith would suffice thee. If thou art not a believer, the Tree of divine Truth would condemn thee to extinction. If thou art a believer, thy faith shall be sufficient for thee above all things that exist on earth, even though thou possess nothing.

Selections from the Writings of the Báb

The primary, the most urgent requirement is ...

O People of Persia! Open your eyes! Pay heed! Release yourselves from this blind following of the bigots, this senseless imitation which is the principal reason why men fall away into paths of ignorance and degradation.
See the true state of things.
Rise up; seize hold of such means as will bring you life and happiness and greatness and glory among all the nations of the world....
The primary, the most urgent requirement is the promotion of education. It is inconceivable that any nation should achieve prosperity and success unless this paramount, this fundamental concern is carried forward. The principal reason for the decline and fall of peoples is ignorance. Today the mass of the people are uninformed even as to ordinary affairs, how much less do they grasp the core of the important problems and complex needs of the time.

`Abdu'l-Bahá, The Secret of Divine Civilization. P. 105

Amongst the proofs demonstrating the truth…

Amongst the proofs demonstrating the truth of this Revelation is this, that in
every age and Dispensation, whenever the invisible Essence was revealed in the person of His Manifestation, certain souls, obscure and detached from all worldly entanglements, would seek illumination from the Sun of Prophethood and Moon of Divine guidance, and would attain unto the Divine Presence. For this reason, the divines of the age and those possessed of wealth, would scorn and scoff at these people. Even as He hath revealed concerning them that erred: “Then said the chiefs of His people who believed not, ‘We see in Thee but a man like ourselves; and we see not any who have followed Thee except our meanest ones of hasty judgment, nor see we any excellence in you above ourselves: nay, we deem you liars.’” They caviled at those holy Manifestations, and protested saying: “None hath followed you except the abject amongst us, those who are worthy of  no attention.” Their aim was to show that no one amongst the learned, the wealthy, and the renowned believed in them. By this and similar proofs they sought to demonstrate the falsity of Him that speaketh naught but the truth.
 In this most resplendent Dispensation, however, this most mighty Sovereignty, a number of illumined divines, of men of consummate learning, of doctors of mature wisdom, have attained unto His Court, drunk the cup of His divine Presence, and been invested with the honor of His most excellent favor. They have renounced, for the sake of the Beloved, the world and all that is therein….

Gleanings From the Writings of Bahá’u’lláh

O kings of the earth!

O kings of the earth! We see you increasing every year your expenditures, and laying the burden thereof on your subjects. This, verily, is wholly and grossly unjust. Fear the sighs and tears of this wronged One, and lay not excessive burdens on your peoples. Do not rob them to rear palaces for yourselves; nay rather choose for them that which ye choose for yourselves. Thus We unfold to your eyes that which profiteth you, if ye but perceive. Your people are your treasures. Beware lest your rule violate the commandments of God, and ye deliver your wards to the hands of the robber. By them ye rule, by their means ye subsist, by their aid ye conquer. Yet, how disdainfully ye look upon them! How strange, how very strange!...
Now that ye have refused the Most Great Peace, hold ye fast unto this, the Lesser Peace, that haply ye may in some degree better your own condition and that of your dependents.

Gleanings From the Writings of Bahá’u’lláh

بگو ای برادران باعمال خود را بیارائید نه باقوال

ای پسر خاک
براستی میگویم غافلترین عباد کسی است که در قول مجادله نماید و بر برادر خود تفوّق جوید
      بگو ای برادران باعمال خود را بیارائید نه باقوال

حضرت بهاءالله , کلمات مکنونه فارسی

O SON OF DUST!
 Verily I say unto thee: Of all men the most negligent is he that disputeth idly and seeketh to advance himself over his brother.
Say: O brethren! Let deeds, not words, be your adorning.

The Hidden Words of Bahá'u'lláh

O Lord! Unto Thee have I turned my face, ...

Say: Magnified be Thy Name, O Lord my God! I beseech Thee by Thy Name through which the splendour of the light of wisdom shone resplendent when the heavens of divine utterance were set in motion amidst mankind, to graciously aid me by Thy heavenly confirmations and enable me to extol Thy Name amongst Thy servants.
O Lord! Unto Thee have I turned my face, detached from all save Thee and holding fast to the hem of the robe of Thy manifold blessings.
Unloose my tongue therefore to proclaim that which will captivate the minds of men and will rejoice their souls and spirits.
Strengthen me then in Thy Cause in such wise that I may not be hindered by the ascendancy of the oppressors among Thy creatures nor withheld by the onslaught of the disbelievers amidst those who dwell in Thy realm.
Make me as a lamp shining throughout Thy lands that those in whose hearts the light of Thy knowledge gloweth and the yearning for Thy love lingereth may be guided by its radiance.
Verily, potent art Thou to do whatsoever Thou willest, and in Thy grasp Thou holdest the kingdom of creation. There is none other God but Thee, the Almighty, the All-Wise.

Tablets of Bahá’u’lláh, P. 152 

Prejudices of Religion, Race or Sect destroy ..

Prejudices of Religion, Race or Sect destroy the foundation of Humanity All the divisions in the world, hatred, war and bloodshed, are caused by one or other of these prejudices. The whole world must be looked upon as one single country, all the nations as one nation, all men as belonging to one race. Religions, races, and nations are all divisions of man’s making only, and are necessary only in his thought; before God there are neither Persians, Arabs, French nor English; God is God for all, and to Him all creation is one.

Abdu'l-Bahá: Paris Talks, P. 132

The third principle of Bahá’u’lláh is:

Religion should be the Cause of Love and Affection Religion should unite all hearts and cause wars and disputes to vanish from the face of the earth, give birth to spirituality, and bring life and light to each heart. If religion becomes a cause of dislike, hatred and division, it were better to be without it, and to withdraw from such a religion would be a truly religious act.
For it is clear that the purpose of a remedy is to cure; but if the remedy should only aggravate the complaint it had better be left alone. Any religion which is not a cause of love and unity is no religion. All the holy prophets were as doctors to the soul; they gave prescriptions for the healing of mankind; thus any remedy that causes disease does not come from the great and supreme Physician.
 
`Abdu'l-BaháParis: Talks