So firm and mighty is this Covenant ...

“So firm and mighty is this Covenant,” He Who is its appointed Center has affirmed, “that from the beginning of time until the present day no religious Dispensation hath produced its like.” “It is indubitably clear,” He, furthermore, has stated, “that the pivot of the oneness of mankind is nothing else but the power of the Covenant.” “Know thou,” He has written, “that the ‘Sure Handle’ mentioned from the foundation of the world in the Books, the Tablets and the Scriptures of old is naught else but the Covenant and the Testament.” And again: “The lamp of the Covenant is the light of the world, and the words traced by the Pen of the Most High a limitless ocean.” “The Lord, the All-Glorified,” He has moreover declared, “hath, beneath the shade of the Tree of Anísá (Tree of Life), made a new Covenant and established a great Testament…

Hath such a Covenant been established in any previous Dispensation, age, period or century? Hath such a Testament, set down by the Pen of the Most High, ever been witnessed? No, by God!” And finally: “The power of the Covenant is as the heat of the sun which quickeneth and promoteth the development of all created things on earth. The light of the Covenant, in like manner, is the educator of the minds, the spirits, the hearts and souls of men.” To this same Covenant He has in His writings referred as the “Conclusive Testimony,” the “Universal Balance,” the “Magnet of God’s grace,” the “Upraised Standard,” the “Irrefutable Testament,” “the all-mighty Covenant, the like of which the sacred Dispensations of the past have never witnessed” and “one of the distinctive features of this most mighty cycle.”

Shoghi Effendi, God Passes By P.239

The power of the Covenant

Should they place in the arena the crown of the government of the whole world, and invite each one of us to accept it, undoubtedly we shall not condescend, and shall refuse to accept it.
  To attain to this supreme station is, however, dependent on the realization of certain conditions: 
The first condition is firmness in the Covenant of God. For the power of the Covenant will protect the Cause of Bahá’u’lláh from the doubts of the people of error. It is the fortified fortress of the Cause of God and the firm pillar of the religion of God. Today no power can conserve the oneness of the Bahá’í world save the Covenant of God; otherwise differences like unto a most great tempest will encompass the Bahá’í world. It is evident that the axis of the oneness of the world of humanity is the power of the Covenant and nothing else.
Had the Covenant not come to pass, had it not been revealed from the Supreme Pen and had not the Book of the Covenant, like unto the ray of the Sun of Reality, illuminated the world, the forces of the Cause of God would have been utterly scattered and certain souls who were the prisoners of their own passions and lusts would have taken into their hands an axe, cutting the root of this Blessed Tree. Every person would have pushed forward his own desire and every individual aired his own opinion! ..


`Abdu'l-Bahá, Tablets of the Divine Plan

I testify, O my God, and my King

“I testify, O my God, and my King, that Thou hast created me to remember Thee, to glorify Thee, and to aid Thy Cause. And yet, I have aided Thine enemies, who have broken Thy Covenant, who have cast  away Thy Book, disbelieved in Thee, and repudiated Thy signs. Alas, alas, for my waywardness, and my shame, and my sinfulness, and my wrong-doing that have withheld me from the depths of the ocean of Thy unity and from fathoming the sea of Thy mercy. Wherefore, alas, alas! and again alas, alas! for my wretchedness and the grievousness of my transgressions! Thou didst call me into being, O my God, to exalt Thy Word, and to manifest Thy Cause. My heedlessness, however, hath deterred me and compassed me about, in such wise that I have arisen to blot out Thy signs, and to shed the blood of Thy loved ones, and of the dawning-places of Thy signs, and of the daysprings of Thy revelation, and of the repositories of Thy mysteries ...

Bahá'u'lláh : Epistle to the Son of the Wolf P.4

God, the unknowable Essence

To every discerning and illuminated heart it is evident that God, the unknowable Essence, the Divine Being, is immensely exalted beyond every human attribute, such as corporeal existence, ascent and descent, egress and regress. Far be it from His glory that human tongue should adequately recount His praise, or that human heart comprehend His fathomless mystery. He is, and hath ever been, veiled in the ancient eternity of His Essence, and will remain in His Reality everlastingly hidden from the sight of men. “No vision taketh in Him, but He taketh in all vision; He is the Subtile, the All-Perceiving.”…
The door of the knowledge of the Ancient of Days being thus closed in the face of all beings, the Source of infinite grace, according to His saying, “His grace hath transcended all things; My grace hath encompassed them all,” hath caused those luminous Gems of Holiness to appear out of the realm of the spirit, in the noble form of the human temple, and be made manifest unto all men, that they may impart unto the world the mysteries of the unchangeable Being, and tell of the subtleties of His imperishable Essence.

Gleanings From the Writings of Bahá’u’lláh P.47

Consider this wronged One.

Consider this wronged One. Though the clearest proofs attest the truth of His Cause; though the prophecies He, in an unmistakable language, hath made have been fulfilled; though, in spite of His not being accounted among the learned, His being unschooled and inexperienced in the disputations current among the divines, He hath rained upon men the showers of His manifold and Divinely-inspired knowledge; yet, behold how this generation hath rejected His authority, and rebelled against Him!

He hath, during the greater part of His life, been sore-tried in the clutches of His enemies. His sufferings have now reached their culmination in this afflictive Prison, into which His oppressors have so unjustly thrown Him.
God grant that, with a penetrating vision and radiant heart, thou mayest observe the things that have come to pass and are now happening, and, pondering them in thine heart, mayest recognize that which most men have, in this Day, failed to perceive.

Gleanings From the Writings of Bahá’u’lláh P.59

Bahá'í Reference Library - Gleanings From the Writings of Bahá’u’lláh, Pages 77-82

 "The measure of the revelation of the Prophets of God in this world, however, must differ. Each and every one of them hath been the Bearer of a distinct Message, and hath been commissioned to reveal Himself through specific acts.
It is for this reason that they appear to vary in their greatness. Their Revelation may be likened unto the light of the moon that sheddeth its radiance upon the earth. Though every time it appeareth, it revealeth a fresh measure of its brightness, yet its inherent splendor can never diminish, nor can its light suffer extinction."

Gleanings From the Writings of Bahá’u’lláh P.80