“16 And what union can there be between God’s temple and idols? For we are the temple of the living God. As God said:
“I will live in them
and walk among them.
I will be their God,
and they will be my people.
17 Therefore, come out from among unbelievers,
and separate yourselves from them, says the Lord.
Don’t touch their filthy things,
and I will welcome you.
18 And I will be your Father,
and you will be my sons and daughters,
says the Lord Almighty.”
Because we have these promises, dear friends, let us cleanse ourselves from everything that can defile our body or spirit. And let us work toward complete holiness because we fear God.

2 Corinthians 6:16 – 7:1 NLT

Costly Grace

Costly grace is the gospel which must be sought again and again and again, the gift which must be asked for, the door at which a man must knock. Such grace is costly because it calls us to follow, and it is grace because it calls us to follow Jesus Christ. It is costly because it costs a man his life, and it is grace because it gives a man the only true life. It is costly because it condemns sin, and grace because it justifies the sinner. Above all, it is costly because it cost God the life of his Son: ‘Ye were bought at a price’, and what has cost God much cannot be cheap for us. Above all, it is grace because God did not reckon his Son too dear a price to pay for our life, but delivered him up for us. Costly grace is the Incarnation of God.”
— Dietrich Bonhoeffer (The Cost of Discipleship)