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

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.

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

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

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.

In poverty and other misfortunes of life, true friends are a sure refuge. The young they keep out of mischief; to the old they are a comfort and aid in their weakness, and those in the prime of life they incite to noble deeds.

No great genius has ever existed without some touch of madness.