God no longer remembers your sin. Faith is trust in God that manifests itself in a willingness to act even when you don't understand. Love is caring about the needs and feelings of others. Paul says the only thing that counts is a trust in God that manifests itself in caring about other people. Being with God is the most important thing.
Insecurity can make a person very unhappy.
You are sure to be insecure if you are building your security and your life on anything in this world because nothing is unshakable. God is eternal. Finding security in being with him is most important. The most important thing is your relationship with God through Jesus Christ. Your sins are all forgiven because Jesus, God's Son, took them to the cross and paid their just penalty.