The condition implied in the Prayer itself is more distinctly asserted. It is, as we have seen, not an arbitrary condition, but the result of the eternal laws of the divine order. Repentance is the condition of being forgiven, and the temper that does not forgive is ipso facto incompatible with the temper of the penitent. As if for greater emphasis, the truth is presented in both its positive and negative aspects.
Related Commentaries of Matthew 6:14
Matthew 6:14-15
14 For if ye forgive men their trespasses, your heavenly Father will also forgive you:
15 But if ye forgive not men their trespasses, neither will your Father forgive your trespasses.