Isaiah 66:21, reveals that God would take some persons
"for" [in the stead of, place of, office of, etc]
"priests and Levites". These are the Christians, a Kingdom of Priests, a royal nation an holy priesthood. Christ Jesus is the true Levi [attached to His Father and attached to us, Divinity and humanity].
Isaiah 66:20-23 KJB, deals with the true "children of Israel" [Jesus [true Israel], and his disciples [true children of Israel]]:
and as such, it speaks of their future inheritance, the New Heavens and New Earth after the 1,000 years of Revelation 20; Isaiah 24; Daniel 7:22; 2 Peter 3:8-13 KJB, etc. As Isaiah 66:23 is given as prophecy, future tense, "It shall come to pass ...", "they shall", etc.
Going back to Colossians 2:16, there were shadows in dealing with the New Moons, but in the Reality [to come], the substance:
See Colossians 2, Ephesians 2; Hebrews 8-10 and their intimate connections KJB:
Colossians 2:16 KJB -
[3.] "or of the new moon" [monthly, based upon phases of the moon]:
Genesis 1:14 KJB - And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:
Genesis 1:16 KJB - And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also.
See also, that there are
“ordinances” [in speaking of celebration thereon] of the moon, were sacrifices, blowing trumpets, etc:
Numbers 28:11 KJB - And in
the beginnings of your months ye shall offer
a burnt offering unto the LORD;
two young bullocks, and one ram, seven lambs of the first year without spot;
Numbers 28:12 KJB - And
three tenth deals of flour for a meat offering, mingled with oil, for one bullock; and
two tenth deals of flour for a meat offering, mingled with oil, for one ram;
Numbers 28:13 KJB - And
a several tenth deal of flour mingled with oil for a meat offering unto one lamb; for a burnt offering of a sweet savour, a sacrifice made by fire unto the LORD.
Numbers 28:14 KJB -
And their drink offerings shall be half an hin of wine unto a bullock, and
the third part of an hin unto a ram, and
a fourth part of an hin unto a lamb: this is
the burnt offering of every month throughout the months of the year.
Numbers 28:15 KJB - And
one kid of the goats for a sin offering unto the LORD shall be offered, beside the continual burnt offering, and his drink offering.
Psalms 81:3 KJB -
Blow up the trumpet in the new moon, in
the time appointed, on our solemn feast day.
Psalms 81:4 KJB - For this
was a statute for Israel,
and a law of the God of Jacob.
Psalms 81:5 KJB -
This he ordained in Joseph
for a testimony, when he went out through the land of Egypt:
where I heard a language
that I understood not.
Ezra 3:5 KJB - And afterward
offered the continual burnt offering, both of
the new moons, and of all the set feasts of the LORD that were consecrated, and of every one that willingly offered
a freewill offering unto the LORD.
Ezekiel 45:17 KJB - And it shall be the prince's part
to give burnt offerings, and meat offerings, and drink offerings, in the feasts, and
in the new moons, and in the sabbaths, in all solemnities of the house of Israel: he shall prepare
the sin offering, and the meat offering, and the burnt offering, and the peace offerings, to make reconciliation for the house of Israel.
Ezekiel 46:6 KJB - And
in the day of the new moon it shall be a young bullock without blemish, and six lambs, and a ram: they shall be without blemish.
[Notice again:
Notice, again,
Isaiah 56:7:
Isaiah 56:7 KJB - Even them will I bring to my holy mountain, and make them joyful in my house of prayer: their burnt offerings and their sacrifices [shall be] accepted upon mine altar; for mine house shall be called an house of prayer for all people.
Then compare to what Isaiah has stated earlier about the New Heavens and New Earth [that earth made new wherein there is
"no more pain..." [Revelation 21:4]], by inspiration of the Holy Spirit [and the context is powerful about the final deliverance of God's people]:
Isaiah 11:9 KJB - They shall not hurt nor destroy in all my holy mountain: for the earth shall be full of the knowledge of the LORD, as the waters cover the sea.
See also:
Isaiah 57:13 KJB - When thou criest, let thy companies deliver thee; but the wind shall carry them all away; vanity shall take [them]: but he that putteth his trust in me shall possess the land, and shall inherit my holy mountain;
Isaiah 65:25 KJB - The wolf and the lamb shall feed together, and the lion shall eat straw like the bullock: and dust [shall be] the serpent's meat. They shall not hurt nor destroy in all my holy mountain, saith the LORD.
Ezekiel 28:14 KJB - Thou [art] the anointed cherub that covereth; and I have set thee [so]: thou wast upon the holy mountain of God; thou hast walked up and down in the midst of the stones of fire.]
The New Moons of the shadow [Colossians 2:16 KJB], see Numbers 28:11-16 KJB, were but the type of a greater antitype:
New Moon to Another
in the New Heaven and Earth, deals with the eating from the literal Tree of Life:
Isaiah 66:22 KJB - For as
the new heavens and the new earth, which I will make, shall remain before me, saith the LORD, so shall your seed and your name remain.
Isaiah 66:23 KJB - And it shall
come to pass, [that] from
one new moon to another, and from
one sabbath to another, shall
all flesh come to
worship before me, saith the LORD.
[Keep in mind that in Isaiah 56:5 KJB, the "everlasting name" given to us by God?, Here it is again as "your name remain", even as the "new heavens and the new earth", "shall remain before" God ever and always. Thus the two passages are connected, even as both mention the Sabbath of the LORD thy God, as being throughout eternity, kept by the "sons" [and "daughters"], the "disciples" of Jesus, etc.]
[Again, the words of that which is "everlasting", "remain before Me [LORD; and He, everlasting, eternal]", speaking of the "new heavens and new earth" all that which is therein. This would include the ["my", says God] Sabbath of the LORD thy God, in the very context of Isaiah 56 & 66, see Isaiah 56:2,4,6 part of the very "my [God's] covenant" [which Jesus made in the Gospels, see Isaiah 56:8; John 10:16, etc] spoken of therein, and see also Isaiah 66:23. This was previously stated in Isaiah 8:10 ["God with us"] through and unto vs 18 itself, as shown, and directly cited in Hebrews 2:9-13, etc.]
Indeed, consider:
Ezekiel 47:12 KJB - And by the river upon the bank thereof, on this side and on that side, shall grow all
trees for meat, whose leaf shall not fade, neither shall the fruit thereof be consumed:
it shall bring forth new fruit according to his months, because their waters they issued out of the sanctuary: and
the fruit thereof shall be for meat, and the leaf thereof for medicine.
Revelation 2:7 KJB - He that hath an ear, let him hear what the Spirit saith unto the churches; To him that overcometh will I give to eat of
the tree of life,
which is in the midst of the paradise of God.
Revelation 22:2 KJB - In the midst of the street of it, and on either side of the river,
was there the tree of life, which
bare twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations.
Revelation 22:14 KJB - Blessed
are they that do his commandments, that they may have right to
the tree of life, and may enter
in through the gates into the city.
[See also:
Isaiah 26:2 KJB - Open ye the gates, that the righteous nation which keepeth the truth may enter in.
Psalms 119:151 KJB - Thou [art] near, O LORD; and all thy commandments [are] truth.
Psalms 119:142 KJB - Thy righteousness [is] an everlasting righteousness, and thy law [is] the truth.
1 John 2:4 KJB - He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.]
Passages on Moon, Moons, New Moon, Month, Months, as needful:
[1] Moon or New Moon: Genesis 37:9; Deuteronomy 4:19, 7:13, 33:14; Joshua 10:12,13; 1 Samuel 20:5,18,24; 2 Kings 4:23, 23:5; Job 25:5, 31:25; Psalms 8:3, 72:5,7, 81:3, 89:37, 104:19, 121:6, 136:9, 148:3; Ecclesiastes 12:2; Song of Songs [Solomon] 6:10; Isaiah 3:18, 13:10, 24:23, 30:26, 60:19,20, 66:23; Jeremiah 8:2, 31:35; Ezekiel 32:7, 46:1,6; Joel 2:10,31, 3:15; Amos 8:5; Habakkuk 3:11; Matthew 24:29; Mark 13:24; Luke 21:25; Acts 2:20; 1 Corinthians 15:41; Colossians 2:16; Revelation 6:12, 8:12, 12:1, 21:23 KJB
[2] Moons or New Moons: 1 Chronicles 23:21; 2 Chronicles 2:4, 8:13, 31:3; Ezra 3:5; Nehemiah 10:33; Isaiah 1;13,14; Ezekiel 45:17, 46:3; Hosea 2:11 KJB
[3] Month: Genesis 7:11, 8:4,5,13,14, 29:14; Exodus 12:2,3,6,18, 13:4,5, 16:1, 19:1, 23:15, 34:18, 40:2,17; Leviticus 16:29, 23:5,6,24,27,32,34,39,41, 25:9, 27:6; Numbers 1:1,18, 3:15,22,28,34,39,40,43, 9:1,3,5,11,22, 10:11, 11:20,21, 18:16, 20:1, 26:62, 28:14,16,17, 29:1,6,7,12, 33:3,38; Deuteronomy 1:3, 16:1, 21:13; Joshua 4:19, 5:10; 1 Samuel 20:27,34; 1 Kings 4:7,27, 5:14, 6:1,37,38, 8:2, 12:32,33; 2 Kings 15:13, 25:1,3,8,25,27; 1 Chronicles 12:15, 27:1,2,3,4,5,7,8,9,10,11,12,13,14,15; 2 Chronicles 3:2, 5:3, 7:10, 15:10, 29:3,17, 30:2,13,15, 31:7, 35:1; Ezra 3:1,6,8, 6:15,19, 7:8,9, 8:31, 10:9,16,17; Nehemiah 1:1, 2:1, 6:15, 7:73, 8:2,14, 9:1; Esther 2:16, 3:7,12,13, 8:9,12, 9:1,15,17,19,21,22; Jeremiah 1:3, 2:24, 28:1,17, 36:9,22, 39:1,2, 41:1, 52:4,6,12,31; Ezekiel 1:1,2, 8:1, 20:1, 24:1, 26:1, 29:1,17, 30:20, 31:1, 32:1,17, 33:21, 40:1, 45:18,20,21,25; Daniel 10:4; Hosea 5:7; Joel 2:23; Haggai 1:1,15, 2:1,10,18,20; Zechariah 1:1,7, 7:1,3,5, 8:19, 11:8; Luke 1:26,36; Revelation 9:15, 22:2 KJB
[4] Months: Genesis 38:24; Exodus 2:2, 12:2; Numbers 10:10, 28:11,14; Judges 11:37,38,39, 19:2, 20:47; 1 Samuel 6:1, 27:7; 2 Samuel 2:11, 5:5, 6:11, 24:8,13; 1 Kings 5:14, 11:16; 2 Kings 15:8, 23:31, 24:8; 1 Chronicles 3:4, 13:14, 21:12, 27:1; 2 Chronicles 36:2,9; Esther 2:12; Job 3:6, 7:3, 14:5, 21:21, 29:2, 39:2; Ezekiel 39:12,14, 47:12; Daniel 4:29; Amos 4:7; Luke 1:24,56, 4:25,35; Acts 7:20, 18:11, 19:8, 20:3, 28:11; Galatians 4:10; Hebrews 11:23; James 5:17; Revelation 9:5,10, 11:2, 13:5 KJB
[5] [One of] the “Great Lights”: Genesis 1:16; Psalms 136:7 KJB
[6] Lesser Light: Genesis 1:16 KJB
[7] Light: Psalms 74:16 KJB