Sanctification is the opposite of conformity.
There is a danger we face when we turn our backs on legalism: it’s the temptation to to lean on grace so hard that we eventually become indistinguishable from the world in which we live.
Our freedom in Christ should never be used as an excuse to be conformed to the world; it should release us to be different.
“I am not praying that You take them out of the world but that You protect them from the evil one. They are not of the world, as I am not of the world. Sanctify them by the truth; Your word is truth.” John 17:15-17 (HCSB)