“I dont never hav enny trouble in regulating mi own kondukt, but tew keep other pholks straight iz what bothers me.”

Josh Billings: His Works, Complete (1873)

Josh Billings: His Works, Complete (1873)

Josh Billings: His Works, Complete (1873)

V. K. Ratliff in Ch. 6
The Town (1957)

As quoted in "Stupid, You Say?" https://news.google.com/newspapers?id=2ykxAAAAIBAJ&sjid=MhAEAAAAIBAJ&pg=4563%2C4702173 by Frank Litsky, in The Milwaukee Sentinel American Weekly (Sunday, September 18, 1960), p. 7.

Source: Lock and Key

Written by Antonio Fresco, Patricia Possollo, Lorena J'zel
Song lyrics, Rattlesnake https://genius.com/Antonio-fresco-patricia-possollo-rattlesnake-lyrics (2019)

1970s
Context: Ever since the secret trip to China, my own relationship with Nixon had grown complicated. Until then I had been an essentially anonymous White House assistant. But now his associates were unhappy, and not without reason, that some journalists were giving me perhaps excessive credit for the more appealing aspects of our foreign policy while blaming Nixon for the unpopular moves.
These tendencies were given impetus by an interview I granted to the Italian journalist Oriana Fallaci, without doubt the single most disastrous conversation I ever had with any member of the press. I saw her briefly on Nov. 2 and 4, 1972, in my office. I did so largely out of vanity. She had interviewed leading personalities all over the world. Fame was sufficiently novel for me to be flattered by the company I would be keeping. I had not bothered to read her writings; her evisceration of other victims was thus unknown to me.

As quoted in "Special Section: Chagrined Cowboy" in TIME magazine (8 October 1979) http://www.time.com/time/magazine/article/0,9171,916877,00.html

As quoted in Dictionary of Thoughts (1908) by Tryon Edwards, p. 22.
Decade unclear
Variant: Do not anticipate trouble, or worry about what may never happen. Keep in the sunlight.