The power of love is represented in the Symposium as running through all nature and all being: at one end descending to animals and plants, and attaining to the highest vision of truth at the other. In an age when man was seeking for an expression of the world around him, the conception of love greatly affected him. One of the first distinctions of language and of mythology was that of gender; and at a later period the ancient physicist, anticipating modern science, saw, or thought that he saw, a sex in plants; there were elective affinities among the elements, marriages of earth and heaven. (Aesch. Frag. Dan.) Love became a mythic personage whom philosophy, borrowing from poetry, converted into an efficient cause of creation. The traces of the existence of love, as of number and figure, were everywhere discerned; and in the Pythagorean list of opposites male and female were ranged side by side with odd and even, finite and infinite.
But Plato seems also to be aware that there is a mystery of love in man as well as in nature, extending beyond the mere immediate relation of the sexes. He is conscious that the highest and noblest