In several places in the book of Revelation Jesus Christ tells us that He is coming quickly.

Rev 3:11  Behold, I am coming quickly! Hold fast what you have, that no one may take your crown.

Rev 22:7  “Behold, I am coming quickly! Blessed is he who keeps the words of the prophecy of this book.”

Rev 22:12  “And behold, I am coming quickly, and My reward is with Me, to give to every one according to his work.

Rev 22:20  He who testifies to these things says, “Surely I am coming quickly.” Amen. Even so, come, Lord Jesus!

Here we are today, 2000 years later, and Jesus Christ hasn’t returned yet.  This naturally leads to the question of what did Jesus mean by, “Behold, I am coming quickly”?

The Greek word translated “quickly” is tachu which can mean, “without delay, soon, or suddenly”.  Since a  period of 2000 years cannot be considered “without delay” or “soon”, the other meaning of “suddenly” must be taken.

Thus, “Behold, I come quickly”, is better understood as “Behold, I come suddenly”.  Suddenly means by surprise, without warning, as a thief in the night.  Indeed this is corroborated by two other Scriptures.

1 Thes 5:2  For you yourselves know perfectly that the day of the Lord so comes as a thief in the night. 

2 Pet 3:10  But the day of the Lord will come as a thief in the night, …