This quote is from the opening paragraph,

to Brave New World in 1932.

“Chronic remorse, as all the moralists are agreed, is a most undesirable sentiment. If you have behaved badly, repent, make what amends you can and address yourself to the task of behaving better next time. On no account brood over your wrongdoing. Rolling in the muck is not the best way of getting clean.”

Aldous Huxley (1894–1963) was a writer, philosopher, and intellectual. He wrote nearly fifty books, both novels and non-fiction work, as well as wide-ranging essays, narratives, and poems. He is well known for his 1932 work, A Brave New World. He was nominated for the Nobel Prize in Literature nine times and was elected Companion of Literature by The Royal Society of Literature in 1962. Huxley was also a humanist and pacifist.