1 Thes. 3:11-13 (ESV)
Now may our God and Father himself, and our Lord Jesus, direct our way to you,  and may the Lord make you increase and abound in love for one another and for all, as we do for you,  so that he may establish your hearts blameless in holiness before our God and Father, at the coming of our Lord Jesus with all his saints.
May the Lord make you increase and abound in love for one another and for all, as we do for you. Notice the source of the love. It is the lord. He increases our love. And in that love he establishes us as blameless in holiness. It isn’t tongues. It isn’t self-righteous sanctimonious behavior. It is love, love from the lord that extends to others. And how can we not have this love, when we consider that our Lord and savior is Lord and savior of all. Can we hate our fellow man when Christ has loved and died for them? The unfortunate answer is yes we can. We are perfectly capable of hate. And hate is the word. But so can we also learn to grow in faith and love, and abound in joy for others, especially our brothers and sisters in Christ.