“The test will measure whether you are an informed, engaged and productive citizen of the world, and it will take place in schools and bars and hospitals and dorm-rooms and in places of worship. You will be tested on first dates, in job interviews, while watching football and while scrolling through your Twitter feed. The test will judge your ability to think about things other than celebrity marriages, whether you'll be easily persuaded by empty political rhetoric and whether you'll be able to place your life and your community in a broader context. The test will last your entire life, and it will be comprised of the millions of decisions that, when taken together, make your life yours. And everything - everything - will be on it.”

Source: Thinking, Fast and Slow

"Spiritualism"
All Things Considered (1908)

Interview by Bill Moyers on Bill Moyers' World Of Ideas (21 October 1988); transcript http://www-tc.pbs.org/moyers/faithandreason/print/pdfs/woi%20asimov2.pdf (pages 5-6)
General sources
Context: Science doesn't purvey absolute truth. Science is a mechanism. It's a way of trying to improve your knowledge of nature. It's a system for testing your thoughts against the universe and seeing whether they match. And this works, not just for the ordinary aspects of science, but for all of life. I should think people would want to know that what they know is truly what the universe is like, or at least as close as they can get to it.

Illusions : The Adventures of a Reluctant Messiah (1977)
Variant: This is a test to see if your mission in this life is complete, if you are alive, it isn't.
Source: The Bridge Across Forever: A True Love Story

Statistical Methods for Research Workers, Edinburgh: Oliver and Boyd, 1925, p. 43.
1910s–1920s

Source: The Bed of Procrustes: Philosophical and Practical Aphorisms (2010), p. 87

Source: Refactoring: Improving the Design of Existing Code, 1999, p. 98.

Source: Refactoring: Improving the Design of Existing Code, 1999, p. 98.