Commentaries:
Robertson's Word Pictures (NT)
Within you (entov umwn). This is the obvious, and, as I think, the necessary meaning of entov. The examples cited of the use of entov in Xenophon and Plato where entov means "among" do not bear that out when investigated. Field (Ot. Norv.) "contends that there is no clear instance of entov in the sense of among" (Bruce), and rightly so. What Jesus says to the Pharisees is that they, as others, are to look for the kingdom of God within themselves, not in outward displays and supernatural manifestations. It is not a localized display "Here" or "There." It is in this sense that in Luke 11:20 Jesus spoke of the kingdom of God as "come upon you" (efqasen ef umav), speaking to Pharisees. The only other instance of entov in the N.T. (Matthew 23:26) necessarily means "within" ("the inside of the cup"). There is, beside, the use of entov meaning "within" in the Oxyrhynchus Papyrus saying of Jesus of the Third Century (Deissmann, Light from the Ancient East, p. 426) which is interesting: "The kingdom of heaven is within you" (entov umwn as here in Luke 17:21).
Other Robertson's Word Pictures (NT) entries containing Luke 17:21:
Luke 17:21
Luke 17:23
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