Religion focuses on who we are in ourselves, and it disqualifies even the best people. But the Gospel of Christ focuses on who we are in Christ, and it qualifies even the worst people.
Religion excludes people, but the Gospel of Christ includes people.
If we [put some of our focus] on us, and some on Christ, we have mixed religion and the Gospel, and the power of God in the Gospel of Christ has been hindered from doing its full work in us, because when we mix both, the result is zero.
Religion is the thing that causes us to focus on our behaviour and not our identity in Christ. The Gospel is what causes us to focus everything on our identity, knowing that our behaviour will be taken care of effortlessly.
~ Creflo Dollar
Now we, brethren, as Isaac was, are children of promise. But, as he who was born according to the flesh then persecuted him who was born according to the Spirit, even so it is now. Nevertheless what does the Scripture say? “Cast out the bondwoman and her son, for the son of the bondwoman shall not be heir with the son of the freewoman.”
~ Galatians 4:28-30 NKJV