A.T. Robertson Commentary Revelation 3:11

"I come quickly: hold fast that which thou hast, that no one take thy crown." — Revelation 3:11 (ASV)

I come quickly (ερχομα ταχυ). As in 2:16; 22:7,12,20. "The keynote of the book" (Beckwith). But allow the author's own meaning of "quickly."

Hold fast that which thou hast (κρατε ο εχεις). Sort of motto for each church (2:25).

That no one take (ινα μηδεις λαβη). Purpose clause with ινα and second aorist active subjunctive of λαμβανω. Here to take away "thy crown" (2:10) which will be thine if really won and not forfeited by failure (2 Timothy 4:8). In that case it will go to another (Matthew 25:28; Romans 11:17f.).