I may have erred at times — no doubt I have erred; this is the law of human nature. For honest errors, however, indulgence may be hoped.

Thomas Jefferson (1743-1826) American political philosopher, polymath, statesman, US President (1801-09)

Letter to the Gentlemen of the Senate (Feb 1801)
    (Source)

On retiring as President of the Senate (Vice President) as he approached his inauguration as President. This is sometimes mis-cited as being part of a letter to Thomas Lomax (25 Feb 1801).