Orison Swett Marden quotes
Time is money. We should not be stingy or mean with it, but we should not throw away an hour any more than we would throw away a dollar-bill. Waste of time means waste of energy, waste of vitality, waste of character in dissipation. It means the waste of opportunities which will never come back. Beware how you kill time, for all your future lives in it.
Pushing to the Front or, Success Under Difficulties (1894)