“An ordinary archer practices until he gets it right. A ranger practices until he never gets it wrong.”

There's a big difference.
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[Denyer, Ralph, The Guitar Handbook, 2002, 66, 0-679-74275-1]

Sex Slavery (1890)
Context: Now for the remedy. It is in one word, the only word that ever brought equity anywhere — LIBERTY! Centuries upon centuries of liberty is the only thing that will cause the disintegration and decay of these pestiferous ideas. Liberty was all that calmed the bloodwaves of religious persecution! You cannot cure serfhood by any other substitution. Not for you to say "in this way shall the race love." Let the race alone.
Will there not be atrocious crimes? Certainly. He is a fool who says there will not be. But you can't stop them by committing the arch-crime and setting a block between the spokes of Progress-wheels. You will never get right until you start right.
As for the final outcome, it matters not one iota. I have my ideal, and it is very pure, and very sacred to me. But yours, equally sacred, may be different and we may both be wrong. But certain am I that with free contract, that form of sexual association will survive which is best adapted to time and place, thus producing the highest evolution of the type. Whether that shall be monogamy, variety, or promiscuity matters naught to us; it is the business of the future, to which we dare not dictate.

Source: The Wonderful Wizard of Oz

As quoted in Leading from Within : Martial Arts Skills for Dynamic Business and Management (1999) by Robert Pater, p. 223

Source: Aleph (2011)
Context: Routine has nothing to do with repetition. To become really good at anything, you have to practice and repeat, practice and repeat, until the technique becomes intuitive.

Diogenes Laërtius, vi. 49
Quoted by Diogenes Laërtius

Source: Life As We Knew It