31“Simon, Simon, behold, Satan demanded to have you,[d] that he might sift you like wheat, 32but I have prayed for you that your faith may not fail. And when you have turned again, strengthen your brothers.”
-Luke 22.31-32 (ESV)
Jesus prayed that the disciples’ faith wouldn’t fail… and he said “when you have turned again, strengthen your brothers”. Is that encouraging to someone who might have just sinned, and maybe devastated by their unfaithfulness? Peter wept bitterly. But Jesus said “when you have turned again, strengthen your brothers”… hope… encouragement.
Don’t let go of the zeal to serve Jesus, and don’t let yourself be deceived into thinking Jesus can’t/wont use you anymore. He says as soon as you find your faith again, get back to worship and witnessing, get right back into edifying the church. You can do all things through him who strengthens you.