Plato said this quote

Every heart sings a song, incomplete, until another heart whispers back. Those who wish to sing always find a song. At the touch of a lover, everyone becomes a poet.

~ Plato

Love is a serious mental disease.

~ Plato

...and when one of them meets the other half, the actual half of himself, whether he be a lover of youth or a lover of another sort, the pair are lost in an amazement of love and friendship and intimacy and one will not be out of the other's sight, as I may say, even for a moment...

~ Plato

Wise men speak because they have something to say, fools because they have to say something.

~ Plato