Grace means that mistakes will be made, sins will occur and forgiveness will be applied. Not because we can go crazy and live life without consequences, but because in life, there are consequences.

We don’t become Christians and stop sinning, we become Christians who keep receiving forgiveness. 

No one ever needed a license to sin. I’ve been doing that before I was old enough to have a license to drive.
But, what the law found in that phrase does, is give people a license to hide.
It gives them a license to keep that sin in their back pocket, because if anyone found out, they would judge them and demand even more rules for their life, as if they weren’t having a hard enough time with the ones they already have, especially the ones they place on themselves.