The Eternal Reward of the Saints

"And there shall be no more curse: but the throne of God and of the
Lamb shall be in it; and His servants shall serve Him." Rev. 22:3

This language shows that God the Father, is referred to, as
well as to the Son. The marks of the curse of sin, and the
ghastly scenes of desolation and decay, will no more be seen on the earth.
Every breeze will be balmy and life-giving, every scene beauty, and every
sound music.

"And they shall see His face; and His name shall be in their
foreheads." Rev. 22:4

The word "His," in the sentence, "They shall see His face," refers to the
Father; for He is the one whose name is in their foreheads. That it is the
Father, we learn from Revelation 14: 1. This will be a fulfillment of the
promise in Matthew 5: 8, "Blessed are the pure in heart: for they shall see
God."

"And there shall be no night there; and they need no candle, neither
light of the sun; for the Lord God giveth them light: and they shall reign
for ever and ever." Rev. 22:5

God is light.  Now in this dark world of sin the truths of God's word are 
the spiritual lights.  In Heaven spiritual as well a visual light originates from 
God.