I struggle with the latter part of this verse.

Matthew 6:12-15And forgive us our debts, as we also have forgiven our debtors. And lead us not into temptation, but deliver us from the evil one. For if you forgive other people when they sin against you, your heavenly Father will also forgive you. But if you do not forgive others their sins, your Father will not forgive your sins. (NIV)