“To be is to think and to be thinkable. To live is to continue thinking and to remember having done so.”

Letter to C. P. Scott (20 January 1920), in Trevor Wilson (ed.), The Political Diaries of C. P. Scott, 1911-1928 (London: Collins, 1970), p. 380
1920s

Source: Gargantua and Pantagruel (1532–1564), Gargantua (1534), Chapter 50 : Gargantua's speech to the vanquished.
Context: Time, which gnaws and diminisheth all things else, augments and increaseth benefits; because a noble action of liberality, done to a man of reason, doth grow continually by his generous thinking of it and remembering it.
Being unwilling therefore any way to degenerate from the hereditary mildness and clemency of my parents, I do now forgive you, deliver you from all fines and imprisonments, fully release you, set you at liberty, and every way make you as frank and free as ever you were before.

Source: As a Man Thinketh

This Business of Living (1935-1950)

2000-09, Who Is Ai Weiwei?, 2009

"The Beetle and the Fly," http://www.theparisreview.org/blog/2014/01/17/the-beetle-and-the-fly/ (January 17, 2014)

Interview to the newspaper "O Globo", 2009.

Source: 1990s and later, Managing in a Time of Great Change (1995), p. 295