Soldiers' graves are the greatest preachers of peace.

The last fact which knowledge can discover is that the world is a manifestation, and in every way a puzzling manifestation, of the universal will to live.

To the man who is truly ethical all life is sacred, including that which from the human point of view seems lower in the scale. He makes distinctions only as each case comes before him, and under the pressure of necessity, as, for example, when it falls to him to decide which of two lives he must sacrifice in order to preserve the other. But all through this series of decisions he is conscious of acting on subjective grounds and arbitrarily, and knows that he bears the responsibility for the life which is sacrificed.

By having a reverence for life, we enter into a spiritual relation with the world By practicing reverence for life we become good, deep, and alive.

As we acquire knowledge, things do not become more comprehensible, but more mysterious.

The first step in the evolution of ethics is a sense of solidarity with other human beings.

Grow into your ideals so that life cannot rob you of them.