If not for Yully's fading energy, Jule would've stayed to make sure Damian's version of chat resembled his and not Dusty's, who was more likely to shoot first and discuss later.
If you are a farmer and work alone, you can only plant as much land as you can personally plow. You can do just a couple of thousand calories of work a day, consuming only the energy produced by the food you ate.
Yully pulled what she could of his energy into her body.
Think about this: Nearly four million exajoules of energy is absorbed by the earth's atmosphere, oceans, and land each year.
People who live their lives following their passions seem more full of life and energy than anyone else.