An unused life is an early death.
Unused
Certainly there is, for the American Negro artist who can escape the restrictions the more advanced among his own group would put upon him, a great field of unused material ready for his art.
Laughter relieves us of superfluous energy, which, if it remained unused, might become negative, that is, poison. Laughter is the antidote.
A trail through the mountains, if used, becomes a path in a short time, but, if unused, becomes blocked by grass in an equally short time.
Before the 1970s, banks were banks. They did what banks were supposed to do in a state capitalist economy: they took unused funds from your bank account, for example, and transferred them to some potentially useful purpose like helping a family buy a home or send a kid to college.