Plato 
Symposium 

Of all the works of Plato the Symposium is the most perfect in form, and may be truly thought to contain more than any commentator has ever dreamed of; or, as Goethe said of one of his own writings, more than the author himself knew. For in philosophy as in prophecy glimpses of the future may often be conveyed in words which could hardly have been understood or interpreted at the time when they were uttered.