Who said “The waking mind is the least serviceable in the arts.”?

“Mind is the great lever of all things.”

“The human mind is our fundamental resource.”

“The empires of the futures are the empires of the mind.”

“The mind is its own place, and in itself Can make a heav'n of hell, a hell of heav'n.”

“What a waste it is to lose one's mind. Or not to have a mind is being very wasteful. How true that is.”

“Life, as it is called, is for most of us one long postponement.”

“The real leader has no need to lead -- he is content to point the way.”

“Every man with a bellyful of the classics is an enemy to the human race.”

“Confusion is a word we have invented for an order which is not understood.”

“Obscenity is a cleansing process, whereas pornography only adds to the murk.”

“The ordinary man is involved in action, the hero acts. An immense difference.”