Man and nature belong together in their created glory – in their tragedy and in their salvation.

The fatal pedagogical error is to throw answers like stones at the heads of those who have not yet asked the questions.

Knowledge of that which concerns us infinitely is possible only in an attitude of infinite concern.

Faith embraces itself and the doubt about itself.

There is no condition for forgiveness.

The character of human life, like the character of the human condition, like the character of all life, is "ambiguity": the inseparable mixture of good and evil, the true and false, the creative and destructive forces-both individual and social.

I have given no definition of love. This is impossible, because there is no higher principle by which it could be defined. It is life itself in its actual unity. The forms and structures in which love embodies itself are the forms and structures in which love overcomes its self-destructive forces.