“There are just two rules of governance in a free society: Mind your own business. Keep your hands to yourself. Keep your hands to yourself, Bill. Hillary, mind your own business.”

Source: The Power of Your Subconscious Mind

Source: The Case-Book of Sherlock Holmes

Variant: It doesn't pay to get discouraged. Keeping busy and making optismism a way of life can restore your faith in yourself

Source: Doktor Sleepless, Volume 1: Engines of Desire

Harvard Law School Forum (1966)

Often misattributed to Friedrich Nietzsche.
Source: As quoted from “Interview with an Immoral,” Arthur Gordon, Reader’s Digest (July 1959). Reprinted in the Kipling Society journal, “Six Hours with Rudyard Kipling”, Vol. XXXIV. No. 162 (June, 1967) pp. 5-8. Interview took place in June, 1935 https://www.kiplingsociety.co.uk/wp-content/uploads/pdf/KJ162.pdf
Context: Looking back, I think he knew that in my innocence I was eager to love everything and please everybody, and he was trying to warn me not to lose my own identity in the process. Time after time he came back to this theme. " The individual has always had to struggle to keep from being overwhelmed by the tribe. To be your own man is a hard business. If you try it, you'll be lonely often, and sometimes frightened. But no price is too high to pay for the privilege of owning yourself."

Mind
Source: I am That, P.121.

Source: Lilith A and Lilith, 1896: A Duplex