We sumtimes hit a thing right the fust blow, but most always a suckcess iz the result ov menny failures.

[We sometimes hit a thing right the first blow, but almost always a success is the result of many failures.]

Josh Billings (1818-1885) American humorist, aphorist [pseud. of Henry Wheeler Shaw]

Everybody’s Friend, Or; Josh Billing’s Encyclopedia and Proverbial Philosophy of Wit and Humor, ch. 132 “Affurisms: Chips” (1874)
    (Source)

In the UK collection Wit and Wisdom of Josh Billings (1913) [ed. H. Montague], this reads:

We sometimes hit the bulls-eye at the first crack, but SUCCESS is usually the result of many failures.