Anaximenes affirms that in its dilatation it resembles a leaf. Heraclitus, that it hath the shape of a boat, and is somewhat crooked. The Stoics, that it is spherical, and it is of the same figure with the world and the stars. Epicurus, that the recited dogmas may be defended.
Complete Works of Plutarch — Volume 3: Essays and Miscellanies · The Wunder Library — complete classics, free to read, with narration.