“The only reason they come to see me is that I know that life is great — and they know I know it.”
As quoted in The Routledge Dictionary of Quotations (1987) by Robert Andrews, p. 3
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Clark Gable 2
American actor 1901–1960Related quotes
Variant: If you have reasons for not coming back, I don't want to know them. I just want you to come back anyway
Source: Tiger Lily
Blue Like Jazz (2003, Nelson Books)
“Trapped in life, only escape I know is death.”
"Hidden"

"Doing What I Know" (song)
Song lyrics
Source: Gilbert O'Sullivan, "Doing What I Know" https://www.youtube.com/watch?v=YlkC9AFrSNU (song on YouTube)