I am overflowing with energy.

Flattened at four in the afternoon, and then a friend calls with a half-formed idea — and suddenly you're up until midnight on it, wide awake.

Which suggests a good deal of it was never in storage. It gets released: by interest, by company, by something being genuinely at stake.

If today feels low, the useful question may not be how much you have left. It may be what you've been spending it on, and how much of that was ever yours to carry.