“If it is true that there is no greater sorrow than to remember a
happy time in a state of misery, it is just as true that calling up a
moment of anguish in a tranquil mood, seated quietly at one's desk, is
a source of profound satisfaction.”

Inferno, canto v, line 121.
Bartlett's Familiar Quotations, 10th ed. (1919)

Album liner - Grand Piano (Narada Anniversay Collection)

Source: A Fine Balance

Un male incerto provoca inquietudine, perché, in fondo, si spera fino all'ultimo che non sia vero; ma un male sicuro, invece, infonde per qualche tempo una squallida tranquillità.
Source: Il Disprezzo (Milano: Bompiani, 1954) p. 77; Angus Davidson (trans.) Contempt (New York: New York Review of Books, 2005) p. 75.

We share the belief that every child is made in the image of God and that every child ought to have the right to an educational opportunity that will enable that child to grow intellectually and spiritually and culturally—not limited by antiquated classrooms, overcrowded classes, or underpaid teachers—but limited only by the capacity which God gave that child to grow.
1950s, Closing address at the final convention of the Congress of Industrial Organizations (1955)
Source: Closing Address at the final convention of the Congress of Industrial Organizations, New York, New York, December 2, 1955, as quoted in Walter P Reuther: Selected Papers (1961), by Henry M. Christman, p. 102

Source: Life, the Truth, and Being Free (2010), p. 19

"Don’t Look Far For The Reason For Unhappiness: The Cause Is Hearts Turning Aside From Allah" in BLITZ (18 January 2015) http://www.weeklyblitz.net/2015/01/dont-look-far-reason-unhappiness-cause-hearts-turning-aside-allah/.
Context: Allah is the only source of happiness, joy, peace and tranquility. We can only be happy and at peace if Allah so desires. Yet if Allah so desires we can also delight in good things. But it is impossible for us to attain that by any other means than faith in Allah.

Source: Henry and June: From "A Journal of Love"--The Unexpurgated Diary of Anaïs Nin