“Oh! let us never, never doubt
What nobody is sure about!”

Homebody (1998)

Address III, Delivered at the opening of the Hall of Science, New York, Sunday, April 26, 1829
A Course of Popular Lectures (1829)

Source: East of Eden (1952)
Context: Maybe that's the reason," Adam said slowly, feeling his way. "Maybe if I had loved him I would have been jealous of him. You were. Maybe-maybe love makes you suspicious and doubting. Is it true that when you love a woman you are never sure-never sure of her because you aren't sure of yourself? I can see it pretty clearly. I can see how you loved him and what it did to you. I did not love him. Maybe he loved me. He tested me and hurt me and punished me and finally he sent me out like a sacrifice, maybe to make up for something. But he did not love you, and so he had faith in you. Maybe — why, maybe it's a kind of reverse.

Source: A Voice in the Wind

Source: The Importance of Being Earnest

God Only Knows (co-written with Tony Asher) ·  1966 Beach Boys performance https://www.youtube.com/watch?v=lpd4jzKA4SA · David Bowie performance (1984) https://www.youtube.com/watch?v=HOadV_CPT_k&spfreload=1 · Brian Wilson and The Corrs at Buckingham Palace (2002) https://www.youtube.com/watch?v=dEMGE9cPwmk · "The Impossible Orchestra" — BBC multi-star performance (2014) https://www.youtube.com/watch?v=XqLTe8h0-jo · Brian Wilson and She & Him : "On The Island" + "God Only Knows" (2015) https://www.youtube.com/watch?v=sruOAvMRjhs
Pet Sounds (1966)

1860s, Letter to James C. Conkling (1863)

Powell told David Frost in a BBC television interview
Quoted in Breaking Ranks Larry Wilkerson Attacked the Iraq War. In the Process, He Lost the Friendship of Colin Powell. https://www.washingtonpost.com/archive/lifestyle/2006/01/19/breaking-ranks-span-classbankheadlarry-wilkerson-attacked-the-iraq-war-in-the-process-he-lost-the-friendship-of-colin-powellspan/d1f359c6-93a0-41c1-beee-2284d6284d47/ Washington Post, by Richard Lei (19 January 2006)
2000s