The biggest lie Lucifer wants the church to believe is that the grace of God is dangerous and must be kept in check.
Tullian Tchividjian

Of course, the enemy wants us to think that the very thing that saves us is dangerous and must be corralled. If angels long to look into salvation, demons must want distract and confuse the issue.

For us to really think that we can “keep grace in check” is pretty arrogant.  God is the one who bestows grace to us in its full measure. Why do we try to ration it?