It is impossible to get anywhere without sinning against reason.

As to science, we may well define it for our purpose as "methodical thinking directed toward finding regulative connections between our sensual experiences".

[Mystery] is the fundamental emotion that stands at the cradle of true art and true science.

What distinguishes the language of science from language as we ordinarily understand the word? ... What science strives for is an utmost acuteness and clarity of concepts as regards their mutual relation and their correspondence to sensory data.

I have firmly decided to bite the dust with a minimum of medical assistance when my time comes, and up to then to sin to my wicked heart's content.

I prefer an attitude of humility corresponding to the weakness of our intellectual understanding of nature and of our own being.

Since that deluge of newspaper articles I have been so flooded with questions, invitations, suggestions, that I keep dreaming I am roasting in Hell, and the mailman is the devil eternally yelling at me, showering me with more bundles of letters at my head because I have not answered the old ones.