“I am a lover of truth, a worshipper of freedom, a celebrant at the altar of language and purity and tolerance.”

Lectures XIV and XV, "The Value of Saintliness"
Source: 1900s, The Varieties of Religious Experience (1902)
Context: I am well aware of how anarchic much of what I say may sound. Expressing myself thus abstractly and briefly, I may seem to despair of the very notion of truth. But I beseech you to reserve your judgment until we see it applied to the details which lie before us. I do indeed disbelieve that we or any other mortal men can attain on a given day to absolutely incorrigible and unimprovable truth about such matters of fact as those with which religions deal. But I reject this dogmatic ideal not out of a perverse delight in intellectual instability. I am no lover of disorder and doubt as such. Rather do I fear to lose truth by this pretension to possess it already wholly.

The Moon Is a Harsh Mistress (1966)

Canto V, stanza 1.
The Lay of the Last Minstrel (1805)

"Homage to Wallace Stevens"
No Truce with the Furies (1995)

Augustus William Hare and Julius Charles Hare Guesses at Truth (London: Macmillan, ([1827-48] 1867) p. 180.
Misattributed

Anthem (1937)

"I Like Dogs", For Men (April 1939); reprinted in People Have More Fun Than Anybody (1994); slightly paraphrased in "And So to Medve", Thurber's Dogs (1955)
From other writings