“When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity.”

“If someone can enjoy marching to music in rank and file, I can feel only contempt for him; he has received his large brain by mistake, a spinal cord would have been enough.”

“Racism is a disease of white people”

“The tendencies we have mentioned are something new for America. They arose when, under the influence of the two World Wars and the consequent concentration of all forces on a military goal, a predominantly military mentality developed, which with the almost sudden victory became even more accentuated. The characteristic feature of this mentality is that people place the importance of what Bertrand Russell so tellingly terms “naked power” far above all other factors which affect the relations between peoples. The Germans, misled by Bismarck’s successes in particular, underwent just such a transformation of their mentality—in consequence of which they were entirely ruined in less than a hundred years. I must frankly confess that the foreign policy of the United States since the termination of hostilities has reminded me, sometimes irresistibly, of the attitude of Germany under Kaiser Wilhelm II, and I know that, independent of me, this analogy has most painfully occurred to others as well. It is characteristic of the military mentality that non-human factors (atom bombs, strategic bases, weapons of all sorts, the possession of raw materials, etc.) are held essential, while the human being, his desires and thoughts—in short, the psychological factors—are considered as unimportant and secondary. Herein lies a certain resemblance to Marxism, at least insofar as its theoretical side alone is kept in view. The individual is degraded to a mere instrument; he becomes “human materiel.” The normal ends of human aspiration vanish with such a viewpoint. Instead, the military mentality raises “naked power” as a goal in itself—one of the strangest illusions to which men can succumb.”

“The value of a college education is not the learning of many facts but the training of the mind to think”

“Education is not the learning of facts, but the training of the mind to think.” 

“Pure mathematics is in its way the poetry of logical ideas.”

“Few are those who see with their own eyes and feel with their own hearts.”

“It is our American habit if we find the foundations of our educational structure unsatisfactory to add another story or wing.”

“There are two important things for full success in life: 1. Don´t tell everything you know.”

“A happy man is too satisfied with the present to dwell too much on the future.”

“Imagination is everything”

“The monotony and solitude of a quiet life stimulates the creative mind.”

“Berusahalah untuk tidak menjadi manusia yang berhasil tapi berusahalah menjadi manusia yang berguna”

“I fully agree with you about the significance and educational value of methodology as well as history and philosophy of science. So many people today - and even professional scientists - seem to me like somebody who has seen thousands of trees but has never seen a forest. A knowledge of the historic and philosophical background gives that kind of independence from prejudices of his generation from which most scientists are suffering. This independence created by philosophical insight is - in my opinion - the mark of distinction between a mere artisan or specialist and a real seeker after truth.