Matthew 1;21-And she will bring forth a Son,and you shall call His name Jesus,for He will save His people from their sins.
Matthew 18;11-For the Son of Man has come to save that which was lost.
Ephesians 2;8-For by grace are ye saved through faith;and that not of yourselfs;it is the gift of God.
2;8-The grace of God is the expression of His goodness toward the undeserving. Grace means unmerited favor,and can be expressed by the acrostic God's Riches At Christ's Expense. This grace is the basis of our salvation (1;7,2;
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Illustration;In salvation men who deserve hell obtain heaven. This cannot be explained apart from God's grace. Every conversion in Scripture is an example of God;s grace.
When Paul (Saul) met the Lord on the Damascus Road,Paul was a persecutor of the church. Yet God made him one of the church's chief preacher's.
We need to remember that we are saved,given the Holy Spirit,and allowed to serve God-by His grace.
Ephesians 2;9-The reason in part,that salvation is not achieved by good works is to prevent men from bragging of having earned a place in heaven by themselves.
You have to washed in the Blood of the Lamb.If you backslide and go back doing the things you did before,You Are Not Saved.You to come back to Jesus and repent of your sins. If you don't do this [repent of your sins] you are going to hell.
God Bless.