This perfectly illustrates the problem with Decisionism. The false doctrine that salvation is about "making a decision for Jesus" or "asking Jesus into your heart". That's not how it works.
You are saved because Jesus Christ suffered and died for you. Faith in Him means trusting Him.
When we look to ourselves for our salvation all we will find is death in our sinful disobedience to God's commandments. It is impossible to be saved by our works and efforts.
Christ alone has accomplished everything, and He did this for you. It is yours. And it is free. You can trust this, believe this, have confidence in this. That is what it means to be saved through our faith. To be saved through our faith does not mean faith in Jesus is a work we do in order to earn salvation; faith is not just another work that can be added to the big long list of works. Faith is trust in Jesus and what Jesus has done for you.
And you cannot do this by yourself, you can't give yourself faith. Only the Holy Spirit can do this. That is why we come together to hear the Gospel preached, it's why we celebrate the Lord's Supper, because through Word and Sacrament God works and creates faith in us by His Spirit. This is why St. Paul writes in Romans 10:17 that "faith comes by hearing, and hearing by the word of Christ". This is why Paul writes in Ephesians 2:8-9 "For it is by grace that you are saved, through faith, and this is not of yourselves, it is the gift of God; not of works, so that no one may boast."
God freely gives Himself to us, His mercy and love and goodness is right here in His word, right here in His Sacraments. It's not mere religious ritual or just stuff we do to look religious; God Himself is right here in our midst powerful and active.
God doesn't need you to be good enough. What God wants is to love you and tell you that you are already loved, you are forgiven of all your sins.
Hear these words again: You are forgiven of all your sins. You are forgiven. It is God Himself who says this. Where does He say this? He says this in the very pierced flesh and shed blood of His Son who bore the cross for you. For you. Yes, for you. That's the Gospel.
Hear the word and believe it. For it is most certainly true.
When, in light of this, you go out and interact with other people, remember God's love for you and the grace and mercy He has for you. In that, imitate Him and love your neighbor. When you fall short, keep hearing the Gospel: You are forgiven. You are forgiven, so when you fall you are not destroyed; in God's mercy you can get up again and go back out there and love others.
-CryptoLutheran