Then we will see each other through His cross. Then we will see the other person as one for whom Jesus gave His life. Then we will be free to deal with one another as God in Christ has dealt with us - forgiving, supporting, being reconciled, caring for one another. Such divine love can't be programmed into congregations. There are no pills, or tonics, or books, or videos, or quick and easy methods to produce this love.
Divine love happens where faith in Jesus happens.
It happens when we hear our sins forgiven for Jesus' sake, when we are recalled to our Baptisms, when we are given Christ's Body and Blood in His Supper, the tokens of His love for us. It happens when the Holy Spirit works faith in our hearts, and we trust God's Word of forgiveness, and cling to Christ for our life. It happens when we die to our selves and all that divides us, and rise to live in the life of Jesus. As Christ's love has its way with us, we will love one another. By this all men will know that you are my disciples, if you have love for one another.