The avarice of mankind is insatiable; at one time two obols was pay enough; but now, when this sum has become customary, men always want more and more without end.

Why is it that all men who are outstanding in philosophy, poetry or the arts are melancholic?

Friendship is two souls inhabiting one body.

If thinking is like perceiving, it must be either a process in which the soul is acted upon by what is capable of being thought, or a process different from but analogous to that. The thinking part of the soul must therefore be, while impassable, capable of receiving the form of an object; that is, must be potentially identical in character with its object without being the object. Mind must be related to what is thinkable, as sense is to what is sensible.

The so-called Pythagoreans, who were the first to take up mathematics, not only advanced this subject, but saturated with it, they fancied that the principles of mathematics were the principles of all things.

When a draco has eaten much fruit, it seeks the juice of the bitter lettuce; it has been seen to do this.

How many a dispute could have been deflated into a single paragraph if the disputants had dared to define their terms