What is "leaves undone"

Usage examples of "leaves undone".

What God forgets and leaves undone the Zealots, bless them, will remember and do.

The one-sided contemplative leaves undone many things that he ought to do.

And should there be a Power who for strange, high reasons calls forth helpless souls from peaceful Nothingness to relentless Life, and judges all Life does and leaves undone, 'tis surely sale to trust its honesty and justice.