Luke 21:34-36

But take heed to yourselves, lest your hearts be weighed down with carousing, drunkenness, and cares of this life, and that Day come on you unexpectedly.  For it will come as a snare on all those who dwell on the face of the whole earth.  Watch therefore, and pray always that you may be counted worthy to escape all these things that will come to pass, and to stand before the Son of Man.  Luke 21:34-36

According to Strong's Concordance, agrupneo, the Greek word translated as watch in verse 36 means "to be sleepless, i.e. keep awake." Frequently, when the Bible mentions being asleep or tells us to wake up, it refers to our spiritual state (Matthew

25:5; Romans 13:11; I Thessalonians 5:6-8). Instead of "watch," some Bible versions use words such as, "don't go to sleep at the switch" (The Message), "be always on the watch" (NIV), "be ready all the time" (New Century Version), "keep awake" (Amplified Bible), "keep on the alert" (NASB), "stay awake" (ESV), "keep a constant watch" (Living Bible), and "beware of slumbering" (The New Testament in Modern Speech). This is a call to the spiritual, not the physical.

It is always a good practice to allow the Bible to interpret itself rather than adding extra-biblical interpretations (II Peter 1:20). Because the Bible uses sleep and waking from sleep as spiritual metaphors, why would we want to add another meaning to the "watch" of Luke 21:36? That would be walking on shaky ground (Deuteronomy 4:2; 12:32), and we want to avoid repeating past error.

To emphasize that "watch" in Luke 21:36 is all about the spiritual and not about the physical, notice how agrupneois used in its only other appearances in the New Testament:

Mark 13:33: "Take heed, watch and pray; for you do not know when the time is." (This verse parallels Luke 21:36.)

Ephesians 6:18: ". . . praying always with all prayer and supplication in the Spirit, being watchful to this end with all perseverance and supplication for all the saints." (The context of this verse is putting on the whole armor of God—definitely a spiritual exercise.)

Hebrews 13:17: Obey those who rule over you, and be submissive, for they watch out for your souls, as those who must give account. Let them do so with joy and not with grief, for that would be unprofitable for you. (The ministry's first priority is the spiritual health of called-out Christians.)

These facts lead to the conclusion that "watch" in Luke 21:36 has little, or perhaps even nothing, to do with watching world events. A careful reading shows that the "watch" of Luke 21:36 is only minimally directing us to watch world events. Overemphasizing that meaning of this verse has overshadowed its real message, perhaps the most important survival instructions Jesus gives to Christians living at the end.