Unforgiveness is a strategic "design," craftily implemented by you enemy to "outwit" you, to cripple your effectiveness in prayer and your power to stand against him victoriously. Which is why, if I were your enemy, I would do everything possible to keep you from forgiving anyone and everyone who's done you any wrong.
(People) either overestimate Satan's influence and power, living with an inflated, erroneous perspective of his abilities. Or they underestimate him. They don't assign him any credit at all for the difficulties he's stirring up beneath the surface of our lives... Satan is not God. And he is not God's counterpart or peer... Satan is nothing but a copycat trying desperately to convince you he's more powerful than he actually is... So even though he's given temporary clearance to strategize and antagonize, we don't need to pray from a position of fear or weakness against him... But we can't expect to experience this power unless we're serious about joining the battle in prayer.
If all we're doing is flinging words and emotions in all directions without any real consideration for the specific ways the enemy is targeting us and the promises of God that apply to us, we're mostly just wasting our time.
As we practice implementing this incredible power tool He's placed in our hands, He divinely positions us - even a little life like ours - in His grand purpose for the ages. Through the connective tissue of prayer, He cracks open the door that makes us at least a small part of how these massive plans of His are translated into the lives of people we know. Including ours.
(The enemy) laughs at your attempts to fix your own issues with timely words and hard work - tactics that might affect matters for a moment but can't begin to touch his underhanded, cunning efforts down where the root issues lie.