Who said “The Promised Land always lies on the other side of a Wilderness.”?

“You may have a fresh start any moment you choose, for this thing that we call ''Failure'' is not the falling down, but the staying down.”

“The obstacle is the path.”

“A barrier is of ideas, not of things.”

“For every mountain there is a miracle.”

“The greatest obstacle to progress is prejudice.”

“To be a leader of men one must turn one's back on men.”

“A man must not swallow more beliefs than he can digest.”

“All civilization has from time to time become a thin crust over a volcano of revolution.”

“Thinking in its lower grades, is comparable to paper money, and in its higher forms it is a kind of poetry.”

“The sun and the moon and the stars would have disappeared long ago...had they happened to be within the reach of predatory human hands.”

“Dancing is the loftiest, the most moving, the most beautiful of the arts, because it is no mere translation or abstraction from life; it is life itself.”