14 Nevertheless, I have a few things against you: There are some among you who hold to the teaching of Balaam, who taught Balak to entice the Israelites to sin so that they ate food sacrificed to idols and committed sexual immorality. 15 Likewise, you also have those who hold to the teaching of the Nicolaitans.

Matthew Henry's Commentary on Revelation 2:14-15

Commentary on Revelation 2:12-17

(Read Revelation 2:12-17)

The word of God is a sword, able to slay both sin and sinners. It turns and cuts every way; but the believer need not fear this sword; yet this confidence cannot be supported without steady obedience. As our Lord notices all the advantages and opportunities we have for duty in the places where we dwell, so he notices our temptations and discouragements from the same causes. In a situation of trials, the church of Pergamos had not denied the faith, either by open apostacy, or by giving way so as to avoid the cross. Christ commends their stedfastness, but reproves their sinful failures. A wrong view of gospel doctrine and Christian liberty, was a root of bitterness from which evil practices grew. Repentance is the duty of churches and bodies of men, as well as of particular persons; those who sin together, should repent together. Here is the promise of favour to those that overcome. The influences and comforts of the Spirit of Christ, come down from heaven into the soul, for its support. This is hidden from the rest of the world. The new name is the name of adoption; when the Holy Spirit shows his own work in the believer's soul, this new name and its real import are understood by him.