“There is no cosmetic for beauty like happiness.”

“The phrase popular science has in itself a touch of absurdity. That knowledge which is popular is not scientific.”

“We especially need imagination in science. It is not all mathematics, nor all logic, but it is somewhat beauty and poetry.”

“The world of learning is so broad, and the human soul is so limited in power!”

“We have a hunger of the mind which asks for knowledge of all around us, and the more we gain, the more is our desire; the more we see, the more we are capable of seeing.”

“That knowledge which is popular is not scientific.”

“I should attempt to treat human vice and folly geometrically... the passions of hatred, anger, envy, and so on, considered in themselves, follow from the necessity and efficacy of nature... I shall...”

“If you can't test it, it's not theorics -- it's metatheorics. A branch of philosophy. So, if you want to think of it this way, our test equipment is what defines the boundary separating theorics fr...”

“Physicists have come to realize that mathematics, when used with sufficient care, is a proven pathway to truth.”

“Love may, indeed, love the beloved when her beauty is lost: but not because it is lost. Love may forgive all infirmities and love still in spite of them: but Love cannot cease to will their removal...”

“Cheap grace is the deadly enemy of our church. We are fighting today for costly grace.”

“Never think that you need to protect God. Because anytime you think you need to protect God, you can be sure that you are worshipping an idol.”