“The things to be investigated are either true or false. If false, pertinacious inquiry will reveal their falsity. If true, they are profoundly important. For there are no half-truths in Nature; every smallest departure has portentous consequences; our eyes must open slowly, or we should be overwhelmed.”

11
Writing for the Theatre (1962)

The Foundations of Mathematics (1925)

Austin (1962) Sense and Sensibilia p. 111.

"Gruppenführer Louis XVI", in A Perfect Vacuum (1971), tr. Michael Kandel (1978)

Sesame and Lilies.
Context: When men are rightly occupied, their amusement grows out of their work, as the colour-petals out of a fruitful flower;—when they are faithfully helpful and compassionate, all their emotions become steady, deep, perpetual, and vivifying to the soul as the natural pulse to the body. But now, having no true business, we pour our whole masculine energy into the false business of money-making; and having no true emotion, we must have false emotions dressed up for us to play with, not innocently, as children with dolls, but guiltily and darkly.

p, 125
The History of Oracles, and the Cheats of the Pagan Priests (1688)

In the Veery journal interview in 1996, in reply to the question of "What is the most rewarding aspect of philosophy?" presented by Veery editor Steven Vita, later reprinted in 1997 in the Austin American-Statesman and then quoted from in The New York Times obituary entitled “Charles Hartshorne, Theologian, Is Dead; Proponent of an Activist God Was 103.”

An Inquiry into Meaning and Truth (1940), Introduction, p. 15
1940s
Context: Science seems to be at war with itself.... Naive realism leads to physics, and physics, if true, shows naive realism to be false. Therefore naive realism, if true, is false; therefore it is false.

Source: Hamlet