Man is he who

The man who thinks only of himself and is thoughtless of others is undoubtedly inferior to the animal because the animal is not possessed of the reasoning faculty. The animal is excused; but in man there is reason, the faculty of justice, the faculty of mercifulness. Possessing all these faculties he must not leave them unused. He who is so hard-hearted as to think only of his own comfort, such an one will not be called man.
Man is he who forgets his own interests for the sake of others. His own comfort he forfeits for the well-being of all. Nay, rather, his own life must he be willing to forfeit for the life of mankind. Such a man is the honor of the world of humanity. Such a man is the glory of the world of mankind. Such a man is the one who wins eternal bliss. Such a man is near to the threshold of God. Such a man is the very manifestation of eternal happiness. Otherwise, men are like animals, exhibiting the same proclivities and propensities as the world of animals. What distinction is there? What prerogatives, what perfections? None whatever! Animals are better even—thinking only of themselves and negligent of the needs of others.

‘Abdu’l-Bahá: Foundations of World Unity. p42