Revelation 2:2-5

I know your industry and activities, laborious toil and trouble, and your patient endurance, and how you cannot tolerate wicked [men] and have tested and critically appraised those who call [themselves] apostles (special messengers of Christ) and yet are not, and have found them to be impostors and liars. I know you are enduring patiently and are bearing up for My name's sake, and you have not fainted or become exhausted or grown weary. But I have this [one charge to make] against you: that you have left (abandoned) the love that you had at first [you have deserted Me, your first love]. Remember then from what heights you have fallen. Repent (change the inner man to meet God's will) and do the works you did previously [when first you knew the Lord], or else I will visit you and remove your lampstand from its place, unless you change your mind and repent.