“By this all men will know that you are my disciples, if you love one another.”
Worldly love arises, either from views of interest or from likeness in manners; carnal love, from the appetite for pleasure. To these, something corrupt, selfish, and base always cleaves. But Christian love arises from the Holy Spirit, and is full of holiness.
from Matthew Henry’s commentary on Colossians 1:1-8