Educating the mind without educating the heart is no education at all.

The educated differ from the uneducated as much as the living differ from the dead.

Learning is an ornament in prosperity, a refuge in adversity, and a provision in old age.

A man without regrets cannot be cured.

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

The habits we form from childhood make no small difference, but rather they make all the difference.

To learn is a natural pleasure, not confined to philosophers, but common to all men.

And, speaking generally, passion seems not to be amenable to reason, but only to force.

To be always seeking after the useful does not become free and exalted souls.