The two most emphatic revelations of the prayer we call the "Our Father" are that we can completely trust God, our loving Father, and that we must forgive those who have sinned against us (for we will be forgiven as we forgive them) (Mt 6:12). These two revelations are interrelated.
When someone sins against us, we are in an impossible situation. We must forgive them, but we cannot, for "to err is human, and to forgive is divine." The only way out of this dilemma is to turn to our divine Father. He will give us the grace to forgive and thereby save ourselves from damnation. This whole experience fills us with thanksgiving for and trust in God, our Father.
If, however, we refuse to seek the Father's grace to forgive those who have sinned against us, then we will not be forgiven. Our sins will progressively warp us. We will project our pride, confusion, slavery, self-deception, and self-hatred onto God. Our Father will seem to be a monster. We will deny that He is a loving Father. We will obviously not trust Him.
What the world desperately needs is to trust God. Therefore, what the world needs is to accept the Father's gift of forgiving others. "In God we trust" — when we forgive.