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.

The city of truth cannot be built on the swampy ground of skepticism.

We must never allow the voice of humanity within us to be silenced. It is humanity's sympathy with all creatures that first makes us truly human.

God much are the truly wealthy. So our inner happiness depends not on what we experience but on the degree of our gratitude to God, Gratitude — the Secret of Life.

Think with deep gratitude of those who have lighted the flames within us.

Thought cannot avoid the ethical or reverence and love for all life. It will abandon the old confined systems of ethics and be forced to recognize the ethics that knows no bounds. But on the other hand, those who believe in love for all creation must realize clearly the difficulties involved in the problem of a boundless ethic and must be resolved not to veil from humankind the conflicts which this ethic will involve us, but allow us really to experience them. To think out in every implication the ethic of love for all creation this is the difficult task which confronts our age.

Man has become a superman ... because he not only disposes oinnate, physical forces, but because he is in command ... olatent forces in nature and because he can put them to his service.... But the essential fact we must surely all feel in our hearts ... is that we are becoming inhuman in proportion as we become supermen.