Science rests on reason and experiment, and can meet an opponent with calmness; [but] a creed is always sensitive.
Sacrifice is the first element of religion, and resolves itself in theological language into the love of God.
To deny the freedom of the will is to make morality impossible.
A person possessed with an idea cannot be reasoned with.
The practical effect of a belief is the real test of its soundness.
The superstition of science scoffs at the superstition of faith.