Having Trouble With Forgiveness? What Does the Bible Say?

These verses speak for themselves and need no commentary from me.

Ephesians 4:31-32 ESV 

Let all bitterness and wrath and anger and clamor and slander be put away from you, along with all malice. Be kind to one another, tenderhearted, forgiving one another, as God in Christ forgave you.

Proverbs 15:1 ESV

A soft answer turns away wrath, but a harsh word stirs up anger.

Matthew 6:14-15 ESV 

For if you forgive others their trespasses, your heavenly Father will also forgive you, but if you do not forgive others their trespasses, neither will your Father forgive your trespasses.

Proverbs 20:22 ESV

Do not say, “I will repay evil”; wait for the Lord, and he will deliver you.

Ephesians 4:31 ESV 

Let all bitterness and wrath and anger and clamor and slander be put away from you, along with all malice.

Proverbs 10:12 ESV

Hatred stirs up strife, but love covers all offenses

James 1:19-20 ESV

Know this, my beloved brothers: let every person be quick to hear, slow to speak, slow to anger; for the anger of man does not produce the righteousness of God.

Hebrews 12:15 ESV 

See to it that no one fails to obtain the grace of God; that no “root of bitterness” springs up and causes trouble, and by it many become defiled;

James 1:26 ESV

If anyone thinks he is religious and does not bridle his tongue but deceives his heart, this person's religion is worthless.

Romans 12:2 ESV

Do not be conformed to this world, but be transformed by the renewal of your mind, that by testing you may discern what is the will of God, what is good and acceptable and perfect.