Darwin on client funds

I have never known a man who was too idle to attend to his
affairs and accounts,who did not get into difficulties; &
he who habitually is in money difficulties, very rarely keeps
scrupulously honorable, & God forbid that this shouldever be your fate.

– Charles Darwin, in a letter to his son accompanying a check to pay off the young man’s debts

As quoted in Willpower:  Rediscovering the Greatest Human Strength by Roy F. Baumeister and John Tierney – The quote appears just below the title of Chapter 5. “Where Have All The Dollars Gone?