No happy man can become miserable, for he will never do acts that are hateful and mean.

Moral excellence comes about as a result of habit. We become just by doing just acts, temperate by doing temperate acts, brave by doing brave acts.

We are what we repeatedly do. Excellence, then, is not an act, but a habit.

Man is a goal-seeking animal. His life only has meaning if he is reaching out and striving for his goals

The least initial deviation from the truth is multiplied later a thousandfold.

Nature does nothing uselessly.

Poverty is the parent of revolution and crime.

We give up leisure in order that we may have leisure, just as we go to war in order that we may have peace.

Happiness is the meaning and the purpose of life: the whole aim and end of human existence.

Happiness is an expression of the soul in considered actions.

It is possible to fail in many ways…while to succeed is possible only in one way.

To be conscious that we are perceiving or thinking is to be conscious of our own existence.

We cannot learn without pain.

Happiness is a state of activity.

For the things we have to learn before we can do them, we learn by doing them.

All men by nature desire to know.

There is no great genius without a mixture of madness.

Happiness depends upon ourselves.

First, have a definite, clear practical ideal; a goal, an objective. Second, have the necessary means to achieve your ends; wisdom, money, materials, and methods. Third, adjust all your means to that end.