https://audioboom.com/boos/5004385-zeal-without-burnout-we-need-sleep

We need sleep and are designed for sleep. God is different.

Psa. 121:3 He will not let your foot slip—he who watches over you will not slumber;

Psa. 121:4 indeed, he who watches over Israel will neither slumber nor sleep.

If we neglect [sleep], we are implicitly claiming an affinity with God that mortals should never claim.

Psa. 127:2 In vain you rise early and stay up late, toiling for food to eat—for he grants sleep to those he loves.

There is no greater delusion than that we can accomplish more by working a great many hours each day, straining mind and body to the limit of endurance, than by working fewer hours with less straining, less fatigue, but with greater freshness and intensity.
First-class work is impossible to brains exhausted by lack of recreation and sleep.”

—Orison Swett Marden from Making Life a Masterpiece