“There are three stages of scientific discovery: first people deny it is true; then they deny it is important; finally they credit the wrong person.”

“There are three stages in scientific discovery. First, people deny that it is true, then they deny that it is important; finally they credit the wrong person.”

“Die gefährlichste Weltanschauung ist die Weltanschauung derer, die die Welt nie angeschaut haben. (The most dangerous worldview is the worldview of those who have not viewed the world)”

“This view of a living nature where man is nothing is both odd and sad. Here, in a fertile land, in an eternal greenness, you search in vain for traces of man; you feel you are carried into a different world from the one you were born into.”

“With most animals, as with man, the alertness of the senses diminishes after years of work, after domestic habits and progress of culture.”

“How a person masters his fate is more important than what his fate is.”

“I am more and more convinced that our happiness or unhappiness depends more on the way we meet the events of life than on the nature of those events themselves.”