"Progress is a nice word. But change is its motivator. And change has its enemies"

"Technological progress has merely provided us with more efficient means for going backwards"

"Finds progress, man's distinctive mark alone, Not God's, and not the beast's; God is, they are, Man partly is, and wholly hopes to be"

"Progress is man's ability to complicate simplicity"

"Problems are the price of progress. Don't bring me anything but trouble. Good news weakens me"

"In my case Pilgrim's Progress consisted in my having to climb down a thousand ladders until I could reach out my hand to the little clod of earth that I am"

"He has no enemies, but is intensely disliked by his friends"

"The power to question is the basis of all human progress"

"Am I not destroying my enemies when I make friends of them?"

"A person who doubts himself is like a man who would enlist in the ranks of his enemies and bear arms against himself. He makes his failure certain by himself being the first person to be convinced of it"

"The man of knowledge must be able not only to love his enemies but also to hate his friends"