At 20 everyone has the face that God gave them, at 40 the face that life gave them, and at 60 the face they earned

Through the power which we win over the forces of nature we get also a gruesome kind of power over our fellow human beings. - Out of My Life and Thoughts

The time will come when public opinion will no longer tolerate amusements based on the mistreatment and killing of animals. The time will come, but when? When will we reach the point that hunting, the pleasure in killing animals for sport, will be regarded as a mental aberration?

To the question whether I am a pessimist or an optimist, I answer that my knowledge is pessimistic, but my willing and hoping are optimistic

An optimist is a person who sees a green light everywhere, while a pessimist sees only the red stoplight. . . The truly wise person is colorblind.

A great secret of success is to go through life as a man who never gets used up

Affirmation of life is the spiritual act by which man ceases to live unreflectively and begins to devote himself to his life with reverence in order to raise it to its true value. To affirm life is to deepen, to make more inward, and to exalt the wil

By respect for life we become religious in a way that is elementary, profound and alive

It is a man's sympathy with all creatures that first makes him truly a man

Man must cease attributing his problems to his environment, and learn again to exercise his will - his personal responsibility in the realm of faith and morals