What is the meaning of Revelation 3:3?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

Remember, then, what you have received and heard. Keep it and repent. If you do not wake up, I will come like a thief, and you will not know the hour when I will come upon you.

Berean Standard Bible (BSB)

Remember therefore how you have received and heard. Keep it, and repent. If therefore you won’t watch, I will come as a thief, and you won’t know what hour I will come upon you.

World English Bible (WEB)

Remember{G3421}{(G5720)} therefore{G3767} how{G4459} thou hast received{G2983}{(G5758)} and{G2532} heard{G191}{(G5656)}, and{G2532} hold fast{G5083}{(G5720)}, and{G2532} repent{G3340}{(G5657)}. If{G3362} therefore{G3767} thou shalt{G1127} not{G3362} watch{G1127}{(G5661)}, I will come{G2240}{(G5692)} on{G1909} thee{G4571} as{G5613} a thief{G2812}, and{G2532} thou shalt{G1097} not{G3364} know{G1097}{(G5632)} what{G4169} hour{G5610} I will come{G2240}{(G5692)} upon{G1909} thee{G4571}.

Strong's King James

(3) Therefore, remember how you received, heard, kept and return! So, if you don't wake up, I will come like a thief and you won't know at what hour I will come to you.

The F.O.G*

[3] Remember the teaching you received and heard! Hold fast to these truths and turn back to Me in repentance. If you don't wake up, I will come unexpectedly like a thief, and you won't know at what hour I will arrive.

The F.O.G Paraphrase

‘Remember, then, how thou hast received, and heard, and be keeping, and reform: if, then, thou mayest not watch, I will come upon thee as a thief, and thou mayest not know what hour I will come upon thee.

Young's Literal Translation