Matter, Energy, and Life of Michaela A. Castello.

en·er·gy | ˈenərjē |

1. the strength and vitality required for sustained physical or mental activity: changes in the levels of vitamins can affect energy and well-being.

  • a person’s physical and mental powers, typically as applied to a particular task or activity: an alternative is to devote your energies to voluntary work.

Hobbies and creative pursuits that re-energize me.