"In your actions and in your conversation do no idle thing."
Wisdom of the Five Nations of the Iroquois Confederacy
I don't think this doesn't mean "don't rest" or "don't take it easy" or "stick to business" or any superficial stricture implying that one should be busy all the time….
Rather, I think it means you should strive to act and talk with passion, ambition, pleasure, pride, compassion, delight, generosity, love, introspection, fairness, good humor….everything that motivates your life in a way that seeks and shares a bountiful existence….
….especially when you are alone, and especially when you are with others.