§ 02 · King James Bible
Hebrews 4:1
Let us therefore fear, lest, a promise being left us of entering into his rest, any of you should seem to come short of it.
Simple English
So, let's not be afraid we might miss out on the special rest God promises, because we don't want anyone to feel like they didn't get enough of it.
* Work in progress - there may be occasional inaccuracies