All essential knowledge relates to existence, or only such knowledge as has an essential relationship to existence is essential knowledge.

When you say 'Yes' or promise something, you can very easily deceive yourself and others also, as if you had already done what you promised. It is easy to think that by making a promise you have at least done part of what you promised to do, as if the promise itself were something of value. Not at all! In fact, when you do not do what you promise, it is a long way back to the truth.

Faith is the highest passion in a human being. Many in every generation may not come that far, but none comes further.

This is what is sad when one contemplates human life, that so many live out their lives in quiet lostness...they live, as it were, away from themselves and vanish like shadows. Their immortal souls are blown away, and they are not disquieted by the question of its immortality, because they are already disintegrated before they die.

What I really need is to get clear out about what I must do, not what I must know, except insofar as knowledge precedes every act.

In the Christianity of Christendom the Cross has become something like the child’s hobby-horse and trumpet.

To despair over one's sins indicates that sin has become or wants to be internally consistent. It wants nothing to do with the good, does not want to be so weak as to listen occasionally to other talk. No, it insists on listening only to itself, on having dealings only with itself; it closes itself up within itself, indeed, locks itself inside one more inclosure, and protects itself against every attack or pursuit by the good by despairing over sin.