“I don't believe in aging. I believe in forever altering one's aspect to the sun.”

Source: Wintergirls

Source: Winnie-the-Pooh

"The Answer" https://www.poetryfoundation.org/poems/50088/the-answer-56d22cd8d69d0, p. 33
The August Sleepwalker (1990)

I Believe (When I Fall in Love It Will Be Forever)
Song lyrics, Talking Book (1972)

Speech in Toronto (1930); as quoted in "Breaking the Last Taboo" (1996) by James A. Haught
As quoted in Jesus: Myth Or Reality? (2006) by Ian Curtis
Religion is the belief in future life and in God. I don't believe in either.
As quoted in The New York Times (19 April 1936)
Variant: I believe that religion is the belief in future life and in God. I don’t believe in either. I don’t believe in God as I don’t believe in Mother Goose.

Speech about Richard Nixon before playing "Ten Cents A Coup" on the Greatest Hits album (February 1970)
Context: I for one don't even believe that he's president. In order to have a president you need to have an election, in order to have an election you have to have a choice, and if you remember back to the primaries there were people running against the war, Kennedy and McCarthy. They often got 85 to 90% of the votes, but when it came time for the parties, that was totally ignored, so in point of fact, there really was no election. For a man who's always wanted to be president, and now that he's president, he's not even president.