“For sin shall not have dominion over you; for ye are not under the law but under grace.” (Romans 6:14)
This grace puts you under the mercy of Gods power of forgiveness and love.
God’s mercy is everlasting and his grace is also. He gave us this grace so that we would be without excuse. But you still have to confess your sins in prayer to God in Jesus name to be in right standings with God. And he will have mercy on you. It’s a promise from him to all who confess and believe.
“And he said unto me my grace is sufficient for thee for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities that the power of Christ may rest upon me.” (Corinthians II 12:9)
Why would you just keep sinning against God after the price Jesus paid with his life? His blood was shed because of your sins. He was sacrificial lamb that removed animal sacrifice. His grace was given to cover you when you sin in ignorance.