Might be the be-all and the end-all here,

But here, upon this bank and shoal of time,

We 'ld jump the life to come. But in these cases

We still have judgment here; that we but teach

Bloody instructions, which being taught, return

To plague the inventor: this even-handed justice

Commends the ingredients of our poison'd chalice

To our own lips.

Macbeth. Act i. Sc. 7.

Besides, this Duncan