You know of the disease in Central Africa called sleeping sickness. . . . There also exists a sleeping sickness of the soul. Its most dangerous aspect is that one is unaware of its coming. That is why you have to be careful. As soon as you notice the slightest sign of indifference, the moment you become aware of the loss of a certain seriousness, of longing, of enthusiasm and zest, take it as a warning. You should realize your soul suffers if you live superficially.

An idea is, in the end, always stronger than circumstances.

In the hearts of people today there is a deep longing for peace. When the true spirit of peace is thoroughly dominant, it becomes an inner experience with unlimited possibilities. Only when this really happens - when the spirit of peace awakens and takes possession of men's hearts, can humanity be saved from perishing.

What we call love is in its essence reverence for life.

The interior joy we feel when we have done a good deed is the nourishment the soul requires.

Impart as much as you can of your spiritual being to those who are on the road with you, and accept as something precious what comes back to you from them.

Jesus as a concrete historical personality remains a stranger to our time, but His spirit, which lies hidden in His words, is known in simplicity, and its influence is direct.