The African is my brother but he is my younger brother by several centuries.

Anyone who has accustomed himself to regard the life of any living creature as worthless is in danger of arriving also at the idea of worthless human lives.

Let me give you a definition of ethics: It is good to maintain and further life it is bad to damage and destroy life.

I still remain convinced that truth, love, peaceableness, meekness, and kindness are the violence which can master all other violence. The world will be theirs as soon as ever a sufficient number of people with purity of heart, with strength, and with perseverance think and live out the thoughts of love and truth, of meekness and peaceableness.

The gratitude that we encounter helps us believe in the goodness of the world, and strengthens us thereby to do what's good.

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.

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?