We are better able to study our neighbours than ourselves, and their actions than our own.

He who hath many friends hath none.

The mathematical sciences particularly exhibit order symmetry and limitations; and these are the greatest forms of the beautiful.

The tyrant, who in order to hold his power, suppresses every superiority, does away with good men, forbids education and light, controls every movement of the citizens and, keeping them under a perpetual servitude, wants them to grow accustomed to baseness and cowardice, has his spies everywhere to listen to what is said in the meetings, and spreads dissension and calumny among the citizens and impoverishes them, is obliged to make war in order to keep his subjects occupied and impose on them permanent need of a chief.

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.

There is nothing unequal as the equal treatment of unequals.

...The entire preoccupation of the physicist is with things that contain within themselves a principle of movement and rest.