The fact that astronomies change while the stars abide is a true analogy of every realm of human life and thought, religion not least of all. No existent theology can be a final formulation of spiritual truth.

Every human life involves an unfathomable mystery, for man is the riddle of the universe, and the riddle of man in his endowment with personal capacities.

Atheism is a theoretical formulation of the discouraged life.

My friends, nothing in all the world is so much worth thinking of as God, Christ, the Bible, sin and salvation, the divine purposes for humankind, life everlasting. But you cannot challenge the dedicated thinking of this generation to these sublime themes upon any such terms as are laid down by an intolerant church.

Picture yourself vividly as winning, and that alone will contribute immeasurably to success.

[L]ife ceases to be a fraction and becomes an integer.

Every great scientist becomes a great scientist because of the inner self-abnegation with which he stands before truth, saying: "Not my will, but thine, be done." What, then, does a man mean by saying, Science displaces religion, when in this deep sense science itself springs from religion?