The abundance of a grateful heart gives honor to God even if it does not turn to Him in words. An unbeliever who is filled with thanks for his very being has ceased to be an unbeliever.

Theology moves back and forth between two poles, the eternal truth of its foundations and the temporal situation in which the eternal truth must be received.

Faith consists in being vitally concerned with that ultimate reality to which I give the symbolical name of God. Whoever reflects earnestly on the meaning of life is on the verge of an act of faith.

The vitality that can stand the abyss of meaninglessness is aware of a hidden meaning within the destruction of meaning.

Courage is a greater virtue than love. At best, it takes courage to love.

Sometimes I think it is my mission to bring faith to the faithless, and doubt to the faithful.

Doubt is the necessary tool of knowledge.