For if you live according to the flesh you will die, but if by the Spirit you put to death the deeds of the body, you will live.
Romans 8:13 ESV

If, having been redeemed, you go back to living according to the flesh, rejecting the priceless gift that God has given, there is no more sacrifice to cover your sins. Nobody can take God’s mercy away from you, but you are capable of rejecting it, even after having received it. If you do so, don’t be surprised if God’s wrath against you is even greater than it would have been if you had never received the truth at all. Yeshua’s blood is the greatest atonement there can ever be, and if you reject it, you reject all hope for eternity.