To the Angel of the church of Ephesus. The great St. Timothy, who was bishop of Ephesus, died a glorious martyr about this time. But as for the admonitions and reprehensions given in these letters, we must take notice, that they are given to the faithful of each church, and not only to the bishops, as it appears by the words so often repeated. (Witham)

Angel. This could have been no other than St. Timothy, who was then bishop of Ephesus. We must not suppose the faults, which are reproved by St. John, to belong individually to St. Timothy, but to some members of the Church. (Bossuet, and others)

These things, saith he, who holdeth, &c. That is, Christ, or the Angel who represented Christ, as appeareth by his titles repeated out of the last chapter.

And hast not failed, or fainted, in opposing the teachers of false doctrine.

Thou has left thy first charity, or first fervour, a common, yet a very dangerous disposition, and especially in a bishop, charged with the care of those under him.

Do penance....practise the first works, return to thy first fervour, or I will remove thy candlestick out of its place. The church of Ephesus is threatened, as in danger to lose its faith, which faith should be transplanted and received in other places. It is what God has divers times permitted, that churches flourishing in the profession of the true Christian faith should be perverted by infidelity and heresy, while the faith hath been planted in other kingdoms of the world. I need not bring instances, where candlesticks have been removed out of their places. (Witham)

The Nicolaites were an infamous sect, who disturbed the rising Church by the superstitions and all the impurities of paganism. See St. Augustine, de hæresib.

To him, to every one that overcometh, I will give to eat of the tree of life, (that is, eternal happiness, differently expressed in these letters) which is in the paradise of my God. It is spoke in the person of Christ, as man. (Witham)