Living truth is that alone which has its origins in thinking. Just as a tree bears year after year the same fruit which is each year new, so must all permanently valuable ideas be continually born again in thought.

At times our own light goes out and is rekindled by a spark from another person. Each of us has cause to think with deep gratitude of those who have lighted the flame within us.

Man has lost the capacity to foresee and to forestall. He will end by destroying the earth.

The only thing of importance, when we depart, will be the traces of love we have left behind.

Joy, sorrow, tears, lamentation, laughter -- to all these music gives voice

Animal protection is education to the humanity.

It's supposed to be a secret, but I'll tell you anyway. We doctors do nothing. We only help. And encourage the doctor within.