What if I stumble?

After a poor choice, the enemy will say you are not qualified to fellowship with God, be used of God, or to be His child anymore. He will tell you that you have changed back to being an old sinner. But one wrong behavior cannot disqualify you or change your identity any more than one right behavior qualifies you or saves you! Committing a sin doesn't make you a sinner any more than committing a righteous deed makes you righteous. We are either qualified by Christ's life, spirit, and blood or we are not qualified! God never asked us to earn our intimacy with Him, only to reflect it!