First in the train of gods, he fashioned Love. And Acusilaus agrees with Hesiod. Thus numerous are the witnesses who acknowledge Love to be the eldest of the gods. And not only is he the eldest, he is also the source of the greatest benefits to us. For I know not any greater blessing to a young man who is beginning life than a virtuous lover or to the lover than a beloved youth. For the principle which ought to be the guide of men who would nobly live at principle, I say, neither kindred, nor honour, nor wealth, nor any other motive is able to implant so well as love. Of what am I speaking? Of the sense of honour and dishonour, without which neither states nor individuals ever do any good or great work. And I say that a lover who is detected in doing any dishonourable act, or submitting through cowardice when any dishonour is done to him by another, will be more pained at being detected by his beloved than at being seen by his father, or by his companions, or by any one else. The beloved too, when he is found in any disgraceful situation, has the same feeling about his lover. And if there were only some way of contriving that a state or an army should be made up of lovers and their loves, they would be the very best governors of their own city, abstaining from all dishonour, and emulating one another in honour; and when fighting at each other's side, although a mere handful, they would overcome the world. For what lover would not choose rather to be seen by all mankind than by his beloved, either when abandoning his post or throwing away his arms? He would be ready to die a thousand deaths rather than endure this. Or who would desert his beloved or fail him in the hour of danger? The veriest coward would become an inspired hero, equal to the bravest, at such a time; Love would inspire him. That courage which, as Homer says, the god breathes into the souls of some heroes, Love of his own nature infuses into the lover.
Love will make men dare to die for their beloved-love alone; and women as well as men. Of this, Alcestis, the daughter of Pelias, is a monument to all Hellas; for she was willing to lay down her life on behalf of her husband, when no one else would, although he had a father and mother; but the tenderness of her love so far exceeded theirs, that she made them seem to be strangers in blood to their own son, and in name only related to him; and so noble did this action of hers appear to the gods, as well as to men, that among the many who have done virtuously she is one of the very few to whom, in admiration of her noble action, they have granted the privilege of returning alive to earth; such exceeding honour is paid by the gods to the devotion and virtue of love. But Orpheus, the son of Oeagrus, the harper, they sent empty away, and presented to him an apparition only of her whom he sought, but herself they would not give up, because he showed no spirit; he was only a harp-player, and did not-dare like Alcestis to die for love, but was contriving how he might enter hades alive; moreover, they afterwards caused him to suffer death at the hands of women, as the punishment of his cowardliness. Very different was the reward of the true love of Achilles towards his lover Patroclus-his lover and not his love (the notion that Patroclus was the beloved one is a foolish error into which Aeschylus has fallen, for Achilles was surely the fairer of the two, fairer also than all the other heroes; and, as Homer informs us, he was still beardless, and younger far). And greatly as the gods honour the virtue of love, still the return of love on the part of the beloved to the lover is more admired and valued and rewarded by them, for the lover is more divine; because he is inspired by God. Now Achilles was quite aware, for he had been told by his mother, that he might avoid death and return home, and live to a good old age, if he abstained from slaying Hector. Nevertheless he gave his life to revenge his friend, and dared to die, not only in his defence, but after he was dead Wherefore the gods honoured him even above Alcestis, and sent him to the Islands of the Blest. These are my reasons for affirming that Love is the eldest and noblest and mightiest of the gods; and the chiefest author and giver of virtue in life, and of happiness after death.
—Plato, Symposium, p. -1