Men become richer not only by increasing their existing wealth but also by decreasing their expenditure.

Nature creates nothing without a purpose.

He is courageous who endures and fears the right thing, for the right motive, in the right way and at the right times.

The one exclusive sign of thorough knowledge is the power of teaching.

Philosophy can make people sick.

[I]t is rather the case that we desire something because we believe it to be good than that we believe a thing to be good because we desire it. It is the thought that starts things off.

A good style must, first of all, be clear. It must not be mean or above the dignity of the subject. It must be appropriate.