“There is a force more powerful than steam and electricity: the will.”

“Happiness! There is no word with more meanings, each person understands it in his own way.”

“There is a force more powerful than steam and electricity: the will.”

“It's sad how people change from the best to the beast.”

“Normality; show me normality, señor caballero, and I will show you an exception to the abnormal order of the universe; show me a normal event and I shall call it miraculous because it is normal.”

“Columbus gave Europe a New World; [Alexander von] Humboldt made it known in its physical, material, intellectual, and moral aspects.”