He who aims at perfekshun will probably miss the mark, but he who aims at nothing, iz sure to hit it every time.

[He who aims at perfection will probably miss the mark, but he who aims at nothing, is sure to hit it every time.]

Josh Billings (1818-1885) American humorist, aphorist [pseud. of Henry Wheeler Shaw]
Josh Billings’ Farmer’s Allminax, 1876-08 (1876 ed.)
    (Source)

See also Aristotle, Thoreau (1854), Lowell (1869).