John Gill Commentary 2 Corinthians 12:20

"For I fear, lest by any means, when I come, I should find you not such as I would, and should myself be found of you such as ye would not; lest by any means [there should be] strife, jealousy, wraths, factions, backbitings, whisperings, swellings, tumults;" — 2 Corinthians 12:20 (ASV)

For I fear lest when I come
This fear arose from his fatherly affection for them, and care of them:

I shall not find you such as I would ;
truly penitent for former sins, thoroughly reformed in life and manners, zealous for God, Christ, and the Gospel, and hearty lovers of one another:

and that I shall be found unto you such as you would not ;
sharp in his reproofs and admonitions, severe in his corrections and censures, and lawfully using the authority he had from Christ, to punish incorrigible offenders:

lest there be debates ;
or "strifes", or contentions among them, about words to no profit, or about their ministers, as before; one being for Paul, and another for Apollos, and another for Cephas:

envyings :
at each other's gifts, or "jealousies" of one another, and evil surmisings:

wraths ;
breaking out into words and actions, which discover hatred of mind, a malignant spirit, quite contrary to that of the Gospel:

strifes :
law suits before heathen magistrates; contentions in the church who shall be greatest; or about lesser matters of religion, or things indifferent, vain, and trifling, and kept up merely for the sake of victory:

backbitings ;
speaking evil of one another, detracting from, hurting, or taking away each other's character and good name:

whisperings ;
secretly sowing discords among friends, and privately suggesting evil things of each other:

swellings ;
with pride and conceit of themselves, because of their riches, learning, and eloquence, and looking with disdain upon others:

tumults ;
at church meetings, interrupting one another, going into parties, and making rents and schisms.