The blessing we receive is more than just forgiveness. It’s more than just having our sins wiped away. We have received the Spirit! In God’s eyes we are seen as perfectly righteous and we stay that way. We have been declared righteous and as proof, God himself dwells in us. We aren’t saved by grace only to go on trying to maintain our status by doing good works. To live that way is foolishness.
The gospel is for salvation but it is also for continued growing through the Spirit. Trusting in Jesus Christ crucified is for all of life and the means God uses for our sanctification, the process of us becoming what God declares us to be.