"Art has a double face, of expression and illusion, just like science has a double face: the reality of error and the phantom of truth."

“Skin of Light and Last Letter to his Wife”

“There is an art to finding your way in the lower regions by the memory of what you have seen when you were higher up. When you can no longer see, you can at least still know. . .”

“Truth is one, but error proliferates. Man tracks it down and cuts it up into little pieces hoping to turn it into grains of truth. But the ultimate atom will always essentially be an error, a miscalculation.”

“Alpinism is the art of climbing mountains by confronting the greatest dangers with the greatest prudence. Art is used here to mean the accomplishment of knowledge in action.”

“Common experience is the gold reserve which confers an exchange value on the currency which words are; without this reserve of shared experiences, all our pronouncements are cheques drawn on insufficient funds.”

“You cannot always stay on the summits. You have to come down again . . .”