The philosopher Plato recorded the last words of his mentor, Socrates, in a dialogue called the Phaedo. According to him, Socrates tried to console his followers by contrasting the nightingale and the swan. In myth the nightingale sang for sorrow, while swans only sang once, at their death. Socrates argued that swans sang because, as Apollo’s birds, they could foresee the joys of the afterworld.
