The greatest marker of our true Christianity is how we love one another. Jesus said that all would know we were His disciples by our love. John Phillips in his commentary Exploring Colossians & Philemon expressed the Biblical idea very well.
Forebearing one another, and forgiving one another, if any man have a quarrel against any: even as Christ forgave you, soalso do ye.
Forebearance! Forgiveness! Here is the grave of all of our squabbles. In the home, at work, on the playing field, and in the church we are called upon to exhibit the spirit of the Lord Jesus.
In one of his sermons, D. L. Moody used to picture the Lord’s saying to Peter, “Go, hunt up the man who put the crown of thorns on My head and tell him that I love him. Tell him that he can have a crown in my kingdom, one without a thorn. Find the man who spat in my face and preach the gospel to him. Tell him that I forgive him and that I died to save him. Find the man who thrust the spear into my side and tell him that there is a quicker way to my heart.” That is how the Lord Jesus has forgiven us. Now it is our turn. We are to forgive others and make an end of our quarrels. The Greek word occurs only here and means “grievances.”
Other interesting quotes and articles about love
Love infected with Disappointment
Bible Teaching on Loving One Another