We know accurately only when we know little, with knowledge doubt increases.
Johann Wolfgang von GoetheThere are but two roads that lead to an important goal and to the doing of great things: strength and perseverance. Strength is the lot of but a few privileged men; but austere perseverance, harsh and continuous, may be employed by the smallest of us and rarely fails of its purpose, for its silent power grows irresistibly greater with time.
Johann Wolfgang von GoetheThe greatest thing in this world is not so much where we stand as in what direction we are moving.
Johann Wolfgang von Goethe