We should take care not to make the intellect our god; it has, of course, powerful muscles, but no personality.

The most beautiful experience we can have is the mysterious.

There is, however, one other human right which is infrequently mentioned but which seems to be destined to become very important: this is the right, or the duty, of the individual to abstain from cooperating in activities which he considers wrong or pernicious.

I am an absolute pacifist ... It is an instinctive feeling. It is a feeling that possesses me, because the murder of men is disgusting.

... we will hope that future historians will explain the morbid symptoms of present-day society as the childhood ailments of an aspiring humanity, due entirely to the excessive speed at which civilization was advancing.

My religion consists of a humble admiration of the illimitable superior spirit who reveals himself in the slight details we are able to perceive with our frail and feeble minds. That deeply emotional conviction of the presence of a superior reasoning power, which is revealed in the incomprehensible universe, forms my idea of God.

Try not to be a person of success, but rather a person of virtue.

To my mind, to kill in war is not a whit better than to commit ordinary murder.

The man who regards his own life and that of his fellow-creatures as meaningless is not merely unfortunate but almost disqualified for life.

Everything that is really great and inspiring is created by the individual who can labor in freedom.