“no knowledge obtained without risk”

Source: Pet Sematary

Source: A careful & strict inquiry into the modern prevailing notions of that freedom of the will, which is supposed to be essential to moral agency, virtue & vice, reward & punishment, praise & blame...

Universities, Actual and Ideal (1874)
1870s
Context: In an ideal University, as I conceive it, a man should be able to obtain instruction in all forms of knowledge, and discipline in the use of all the methods by which knowledge is obtained. In such a University, the force of living example should fire the student with a noble ambition to emulate the learning of learned men, and to follow in the footsteps of the explorers of new fields of knowledge. And the very air he breathes should be charged with that enthusiasm for truth, that fanaticism of veracity, which is a greater possession than much learning; a nobler gift than the power of increasing knowledge; by so much greater and nobler than these, as the moral nature of man is greater than the intellectual; for veracity is the heart of morality.

Introduction
Popular Astronomy: A Series of Lectures Delivered at Ipswich (1868)

Source: Absentee Ownership (1923), p. 191

À vaincre sans péril, on triomphe sans gloire.
Don Gomès, act II, scene ii.
Le Cid (1636)

Sexing the Cherry (1989)
Variant: What you risk reveals what you value. (p.91)
Source: Written on the Body

2014, 25th Anniversary of Polish Freedom Day Speech (June 2014)

"Critique of the Physical Concepts of the Corpuscular Theory" in The Physical Principles of the Quantum Theory (1930) as translated by Carl Eckhart and Frank C. Hoyt, p. 20; also in "The Uncertainty Principle" in The World of Mathematics : A Small Library of the Literature of Mathematics (1956) by James Roy Newman, p. 1051