Freedom From Bitterness
For us to cultivate kindness in our lives, we must first cultivate the soil of our heart in order to produce a healthy harvest.
8 He has told you, O man, what is good;
and what does the Lord require of you
but to do justice, and to love kindness, 
and to walk humbly with your God?
30 And do not grieve the Holy Spirit of God, by whom you were sealed for the day of redemption. 31 Let all bitterness and wrath and anger and clamor and slander be put away from you, along with all malice. 32 Be kind to one another, tenderhearted, forgiving one another, as God in Christ forgave you. (ESV)
 6:8 Or steadfast love