Almagest

• I know that I am mortal by nature and ephemeral, but when I trace at my pleasure the windings to and fro of the heavenly bodies, I no longer touch earth with my feet. I stand in the presence of Zeus himself and take my fill of ambrosia.
  • Penned in the margins.

Tetrabiblos

• Everything that is hard to attain is easily assailed by the generality of men.
  • Book I, sec. 1

• The length of life takes the leading place among inquiries about events following birth.
  • Book III, sec. 10

• As material fortune is associated with the properties of the body, so honor belongs to those of the soul.
  • Book IV, sec. 1

• There are three classes of friendship and enmity, since men are so disposed to one another either by preference or by need or through pleasure and pain.
  • Book IV, sec. 7