our conversation - rather, “our state” or “country”; our citizenship: our life as citizens. We are but pilgrims on earth; how then should we “mind earthly things?” (Phi 3:19; Heb 11:9, Heb 11:10, Heb 11:13-16). Roman citizenship was then highly prized; how much more should the heavenly citizenship (Act 22:28; compare Luk 10:20)?
is - Greek, “has its existence.”
in heaven - Greek, “in the heavens.”
look for the Saviour, the Lord Jesus Christ - “We wait for (so the same Greek is translated, Rom 8:19) the Lord Jesus as a (that is, in the capacity of a) Savior” (Heb 9:28). That He is “the Lord,” now exalted above every name, assures our expectation (Phi 2:9-11). Our High Priest is gone up into the Holy of Holies not made with hands, there to atone for us; and as the Israelites stood outside the tabernacle, expecting Aaron’s return (compare Luk 1:21), so must we look unto the heavens expecting Christ thence.