"Do not worry about your difficulties in mathematics; I can assure you that mine are much greater."
"I want to know how God created this world. I am not interested in this or that phenomenon, in the spectrum of this or that element. I want to know His thoughts; the rest are details."
"The years of anxious searching in the dark, with their intense longing, their intense alternations of confidence and exhaustion and the final emergence into the light—only those who have experienced it can understand it."
"It is almost a miracle that modern teaching methods have not yet entirely strangled the holy curiosity of inquiry; for what this delicate little plant needs more than anything, besides stimulation, is freedom."
"One thing I have learned in a long life; that all our science, measured against reality, is primitive and childlike—yet it is the most precious thing we have."
"Why is it that nobody understands me, and everybody likes me?"