The highest knowledge is to know that we are surrounded by mystery. Neither knowledge nor hope for the future can be the pivot of our life or determine its direction. It is intended to be solely determined by our allowing ourselves to be gripped by the ethical God, who reveals Himself in us, and by our yielding our will to His.

No one may shut his eyes to think the pain, which is therefore not visible to him, is non-existent.

The quiet conscience is an invention of the devil.

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

Ethics, too, are nothing but reverence for life. This is what gives me the fundamental principle of morality, namely, that good consists in maintaining, promoting, and enhancing life, and that destroying, injuring, and limiting life are evil.

Any religion or philosophy which is not based on a respect for life is not a true religion or philosophy.

We need a boundless ethics which will include animals also.