It is impossible, or not easy, to alter by argument what has long been absorbed by habit.

Moral virtue is the child of habit.

The roots of education are bitter, but the fruit is sweet.

It is absurd to hold that a man ought to be ashamed of being unable to defend himself with his limbs, but not of being unable to defend himself with speech and reason.

Poverty is the parent of revolution and crime.

Anybody can become angry—that is easy, but to be angry with the right person and to the right degree and at the right time and for the right purpose, and in the right way—that is not within everybody’s power and is not easy.

Happiness is a quality of the soul, not a function of one's material circumstances.

He who has overcome his fears will truly be free.

To appreciate the beauty of a snowflake, it is necessary to stand out in the cold.