this to Brontinus, and Leon, and Bathyllus. About things invisible, and things mortal, the Gods alone have a certain knowledge; but men may form conjectures.…” And so on.
He used also to say that the soul was immortal, and that it was in a state of perpetual motion in the same way as the sun.
LIFE OF HIPPASUS.
I. Hippasus was a citizen of Metapontum, and a pupil of Pythagoras.
II. He used to say that the time of the changes of the world was definite, and that the universe also was finite, and in a state of perpetual motion.
III. Demetrius, in his treatise on People of the same Name, says that he left no writings behind him.
IV. There were two people of the name of Hippasus; this man, and another who wrote an account of the Constitution of the Lacedæmonians, in five books. And he was himself a Lacedæmonian.
# LIFE OF PHILOLAUS.
I. Philolaus was a native of Crotona, and a pupil of