This is the answer I gave a lady who wrote asking how she could translate Christ's love into action in regard to her estranged husband.
Love finds nothing to be glad about when someone goes wrong, but is glad when truth is glad.
Love lasts for ever. It's how we respond in our inner man to others. When God's love enters our hearts by the Holy Spirit then our hearts take on a loving posture towards other people. This then urges us or propels us into works of love towards them or on their behalf. You are forgiving those you might have cause to have something against and you are praying for them.