Question:
If there are only “believers” on the earth at the beginning of the 1,000 year reign of Christ, why will the residue of men (believing Jews?)and all the (believing?) Gentiles need to “seek after the Lord,” as stated in Acts 15:17, if they are already saved?
Answer:
There children born to them will be unsaved and need salvation. Apparently millions will not have believed on Jesus by the time the 1,000 years are expired as Satan when loosed will be able to gather them on his (Satan’s) side. Read Revelation 20:7-10.