“Every industrious man, in every lawful calling, is a useful man. And one principal reason why men are so often useless is that they neglect their own profession or calling, and divide and shift the...”

“For every minute you are angry you lose sixty seconds of happiness.”

“Adopt the pace of nature: her secret is patience.”

“Spiritual force is stronger than material force thoughts rule the world. ”

“I am the lover of uncontained and immortal beauty. In the wilderness, I find something more dear and connate than in streets or villages. In the tranquil landscape, and especially in the distant li...”

“To go into solitude, a man needs to retire as much from his chamber as from society. I am not solitary whilst I read and write, though nobody is with me. But if a man would be alone, let him look a...”

“To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.”

“Copernicus, Galileo, and Kepler did not solve an old problem, they asked a new question, and in doing so they changed the whole basis on which the old questions had been framed.”

“The Egyptians saw the sun and called him Ra, the Sun God. He rode across the sky in his chariot until it was time to sleep. Copernicus and Galileo proved otherwise and poor Ra lost his divinity.”

“Men of lofty genius when they are doing the least work are most active.”

“Neither a lofty degree of intelligence nor imagination nor both together go to the making of genius. Love, love, love, that is the soul of genius.”

“There's a fine line between genius and insanity. I have erased this line.”