A man would do nothing if he waited until he could do it so well that no one could find fault.
Calculation never made a hero.
Courage does not consist in calculation, but in fighting against chances.
Faith ... Acts promptly and boldly on the occasion, on slender evidence.
Faith is the result of the act of the will, following upon a conviction that to believe is a duty.
If we are intended for great ends, we are called to great hazards.
If we insist on being as sure as is conceivable ... We must be content to creep along the ground, and can never soar.
It is as absurd to argue men, as to torture them, into believing.
Learn to do thy part and leave the rest to heaven.
To live is to change, and to be perfect is to change often.
