Revelation 2:2b; Thou Tried Them
Revelation 2:2 … and how thou canst not bear them which are evil: and thou hast tried them which say they are apostles, and are not, and hast found them liars:
The Church at Ephesus had spiritual discernment, able to tell good from evil, true from the false. You may say, they took full heed to Paul’s advice to them when Paul left them in Acts 20 after 3 years of ministry.
Acts 20:28-31 Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers, to feed the church of God, which he hath purchased with his own blood. 29For I know this, that after my departing shall grievous wolves enter in among you, not sparing the flock. 30Also of your own selves shall men arise, speaking perverse things, to draw away disciples after them. 31Therefore watch, and remember, that by the space of three years I ceased not to warn every one night and day with tears.
They had the best of teaching. The Apostle Paul himself taught them.
Acts 20:25-27 And now, behold, I know that ye all, among whom I have gone preaching the kingdom of God, shall see my face no more. 26Wherefore I take you to record this day, that I am pure from the blood of all men. 27For I have not shunned to declare unto you all the counsel of God.
2 Corinthians 11:13 For such are false apostles, deceitful workers, transforming themselves into the apostles of Christ.
John himself had also taught them to try every spirit.
1 John 4:1-3 Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world. 2Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God: 3And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spiritof antichrist, whereof ye have heard that it should come; and even now already is it in the world.
They were commended for the courage to identify evil and to put evil away.
Psalm 1:1 Blessed is the man that walketh not in the counsel of the ungodly, nor standeth in the way of sinners, nor sitteth in the seat of the scornful. Amen.