THE INTENTION IS ENOUGH
PSALM 21:11 Though they plot evil against you and devise wicked schemes, they cannot succeed.
ELLICOTT'S COMMENTARY Though they have intended evil against thee, have plotted mischief, they have no power at all.
BARNES' NOTES The purposes of wicked men are usually much more than a mere "intention." The intention is accompanied with a scheme or plan in their own mind by which the act may be accomplished. The evil here referred to was that of resisting or overpowering him who was engaged in the cause of God, or whom God had appointed to administer his laws.
MATTHEW POOLE'S COMMENTARY Against God, not directly, but by consequence, because it was against whom God had anointed, and against the Lord’s people, whose injuries God takes as done to himself.
PULPIT COMMENTARY The "intention" is enough. They imagined a mischievous device, which they are not able to perform. The inability is not so much from a deficiency of strength in themselves, as from the opposition offered to their schemes by God. The best-laid plans are powerless, if God wills to baffle them.