prayer:

"Prayer makes us vulnerable to others. It's difficult to cling to our defenses, our prejudices, and even our anger at another person when we're praying for them. The more we pray for someone, even an enemy, the more God softens the heart toward that person -- the more that person changes from enemy to friend. Prayer makes it more likely that we can move from seeing someone as "garbage" to actually, seeing the person as a child of God."

~ Mark Yaconelli (from the book Downtime: Helping Teenagers Pray)