And there shall no longer be ANY CURSE;
Ever since the Garden of Eden, the current earth has been under a CURSE (Genesis 3:8-17-24). Even during the 1,000 year reign of Christ (Revelation 20:4-6) the curse was still present albeit suppressed. It, the CURSE, was reactivated during the final deception of Satan (Revelation 20:7-10). Here in the new heaven, new earth, and new Jerusalem, the CURSE(s) are removed forever.
and THE THRONE of GOD and of the LAMB shall be in it,
As if to confirm the removal of the CURSE, THE THRONE is shown to be here (see verse 1 also). The CURSE and the THRONE both cannot occupy the same righteous/spiritual space. So with the presence of the THRONE, the CURSE must be gone. Given this eternal principle, imagine the conflict that goes on within a current earth believer. We, believers, are the temple of GOD (1 Corinthians 3:16-17-23) and yet had walked in the CURSED state until we believed (Ephesians 2:1-10). Which one of us doesn't submit to the conflict within (or slip into the "good feeling" of the CURSED state)? In the new earth, because of the presence of the THRONE, we NEVER will find ourselves with this conflict!
and His bondservants shall SERVE Him;
John, as a bondservant (Revelation 1:1) comes full circle. John tells us that he plans on SERVING Him forever and ever (verse 5).
Interestingly, this may be what Zechariah was talking about in Zechariah 14:1-11-21. Being His bondservant in this verse is like the "no longer a Canaanite in the house of the Lord" expression in Zechariah. The spiritual process of becoming a bondservant is like that given by Paul in his letter to the Galatians (Galatians 3). We have put on Christ like a coat over the CURSED man inside. But having put on the coat which is Christ, we become "one in Christ Jesus". This oneness allows us to SERVE Him, God, in a priestly manner (Revelation 1:6) with the LAMB as High Priest (Hebrews 9:11-14-14).
Some Christians have a difficult time with the concept of heaven. They view it as a "boring" place meaning "what can we possibly do forever and ever?". In this verse, it is shown that there are infinite ways we will SERVE an infinite God. Our minds have no way of conceiving the ways we will SERVE Him (by bringing the GLORY and HONOR to the THRONE for starters - Revelation 21:26).