Revelation 21:2, 10 and 22:19 declare that New Jerusalem is the holy city. As the consummation of everything positive in the Bible, New Jerusalem is the ultimate expression of God’s holiness through His people.

A series of posts looked at God’s impartation of His holiness into His chosen people. This series did not touch holy days, holy garments, holy places, etc. and only looked at a minority of the verses about God’s holy people.

Here is a summary and link to each of the posts.
A. God’s basic word is in 1 Peter 1:16, “You shall be holy because I am holy.” Our being holy is a result of the life we received in regeneration (1 Peter 2:9, 1:23).
B. Jesus Christ came to establish the new covenant promised in Jeremiah 31. He was “begotten of the Holy Spirit” (Matthew 1:20), is “the Holy One” in His human living (John 6:69), in His death and resurrection (Acts 3:14), and in His ascension (Revelation 3:7).
C. It is of God that we “are in Christ Jesus, who became wisdom to us from God: both righteousness and sanctification and redemption.”
D. God “saved us and called us with a holy calling…” (2 Timothy 1:9) and we “were sealed with the Holy Spirit of the promise” (Ephesians 1:13).
E. Hebrews 10:10 says “we have been sanctified…once for all.” This speaks of a fact accomplished by the Lord and applied to us. Hebrews 10:14 says we “are being sanctified.” This speaks of His gradual working of the fact into all our being and all our living.
F. Ephesians 2:21 says that in Christ we are “growing into a holy temple in the Lord.” This is an ongoing experience by the washing of the water in the word (Ephesians 5:26-27).
G. We pursue sanctification (Hebrews 12:14) and exercise to be holy by contacting the One who is holy. Such contact is in spirit by our prayer, singing, praising, reading, or speaking.
H. 2 Thessalonians 2:13 says “…God chose you from the beginning unto salvation in sanctification of the Spirit and belief of the truth.” He disciplines us “that we might partake of His holiness.” Don’t be discouraged; God’s choosing and discipline will bring forth our sanctification.
I. As we are pursuing a holy manner of life, we are “expecting and hastening the coming of the day of God” (2 Peter 3:12). Come Lord Jesus!
J. In Hebrews 2:10 God is leading many sons into glory and in verses 11-12 the Lord (“He who sanctifies”) is singing praises to the Father in our (“we who are being sanctified”) singing.

God’s choosing and calling of us, Jesus Christ the Holy One as our sanctification, and the Spirit’s sanctifying work in us bring us onward to “the coming of the day of God” and New Jerusalem.

Reminder: the English words holy/holiness (from an Anglo-Saxon root) and sanctify/sanctification (from a Latin root) seem very different, but they are translations of closely related NT Greek words.