Revelation 3:11 Behold, I come quickly: hold that fast which thou hast, that no man take thy crown.
You can not lose your salvation. You are saved by grace. You didn’t deserve it in the first place. He knew then just like now who you were and all that you would do but saved you. He saved you not because you are worthy but because He is good.
We will never face a judgment to see if we are saved or not. Our salvation is secure. We will never be judged for our sins or failures they have already been forgiven and forgotten.
However, we will be rewarded at the judgment seat of Christ. How we live and what we do determines our reward. In this verse, the Holy Spirit tells the church not to lose the crown that was prepared for them. God wants to reward us. He has prepared rewards for us. If we, however, decide not to honor and serve Him we will not be rewarded like He wants us to be rewarded and like we want to be rewarded.
Don’t let salvation by grace make you think that you shouldn’t be fighting against sin and striving to be used of God. He will reward us. We like Paul should get ourselves under control and fight to win the crown!