“He who does nothing makes no mistakes; he who makes no mistakes learns nothing.”

Source: One Minute Nonsense (1992), p. 20

Source: An Outcast of the Islands (1896), Pt. 3, Ch. 2; possibly an adaptation of a Polish proverb, "Ten się nie myli, kto nic nie robi" — "One is not wrong, who does nothing."

Variant: He who never makes a mistake never makes anything. It's part of learning the job.
Source: Revenge of the Witch

Referring to Napoleon III, in "Mistaken Lessons from the Past", The Listener (6 June 1963)

Source: One Minute Nonsense (1992), p. 21
Context: "Tell me," said the atheist, "Is there a God — really?"
Said the master, "If you want me to be perfectly honest with you, I will not answer."
Later the disciples demanded to know why he had not answered.
"Because the question is unanswerable," said the Master.
"So you are an atheist?"
"Certainly not. The atheist makes the mistake of denying that of which nothing may be said... and the theist makes the mistake of affirming it.

Ron English's Fauxlosophy: Volume 2 (2022)

As quoted by Jacob A. Riis in Theodore Roosevelt, the Citizen (1904), chapter XVI A Young Men's Hero http://www.bartleby.com/206/16.html
1900s

Not found in Burke's writings. Appears to be a paraphrase of "It is the greatest of all mistakes to do nothing because you can only do little." sourced to Sydney Smith (1771 - 1845).