Never say there is nothing beautiful in the world anymore. There is always something to make you wonder in the shape of a tree, the trembling of a leaf.

The deeper we look into nature, the more we recognize that it is full of life, and the more profoundly we know that all life is a secret and that we are united with all life that is in nature.

In case my life should end with the cannibals, I hope they will write on my tombstone, 'We have eaten Dr. Schweitzer. He was good to the end.'

Thought is the strongest thing we have. Work done by true and profound thought - that is a real force.

To me, good health is more than just exercise and diet. Its really a point of view and a mental attitude you have about yourself.

Compassion, in which all ethics must take root, can only attain its full breadth and depth if it embraces all living creatures and does not limit itself to mankind.

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