Levites were consecrated to God from birth. Num_3:12 And I, behold, I have taken the Levites from among the children of Israel instead of all the firstborn that opens the matrix among the children of Israel: therefore the Levites shall be mine;
They were ministers of the tabernacle Numbers 7:5 Num_18:6 And I, behold, I have taken your brethren the Levites from among the children of Israel: to you they are given as a gift for the LORD, to do the service of the tabernacle of the congregation.
Many verses state that Levites were appointed to praise the Lord.
1Ch_16:4 And he appointed certain of the Levites to minister before the ark of the LORD, and to record, and to thank and praise the LORD God of Israel:
2Ch_7:6 And the priests waited on their offices: the Levites also with instruments of musick of the LORD, which David the king had made to praise the LORD, because his mercy endureth for ever, when David praised by their ministry; and the priests sounded trumpets before them, and all Israel stood. Ch_20:19 And the Levites, of the children of the Kohathites, and of the children of the Korhites, stood up to praise the LORD God of Israel with a loud voice on high. 2Ch_29:30 Moreover Hezekiah the king and the princes commanded the Levites to sing praise unto the LORD with the words of David, and of Asaph the seer. And they sang praises with gladness, and they bowed their heads and worshipped.
2Ch_31:2 And Hezekiah appointed the courses of the priests and the Levites after their courses, every man according to his service, the priests and Levites for burnt offerings and for peace offerings, to minister, and to give thanks, and to praise in the gates of the tents of the LORD.
Ezr_3:10 And when the builders laid the foundation of the temple of the LORD, they set the priests in their apparel with trumpets, and the Levites the sons of Asaph with cymbals, to praise the LORD, after the ordinance of David king of Israel.
Neh_9:5 Then the Levites, Jeshua, and Kadmiel, Bani, Hashabniah, Sherebiah, Hodijah, Shebaniah, and Pethahiah, said, Stand up and bless the LORD your God for ever and ever: and blessed be thy glorious name, which is exalted above all blessing and praise.
Neh_12:24 And the chief of the Levites: Hashabiah, Sherebiah, and Jeshua the son of Kadmiel, with their brethren over against them, to praise and to give thanks, according to the commandment of David the man of God, ward over against ward.
Everything in the old covenant is a physical representation of a spiritual truth.The levitical priest ground the spices and then put them on the fire to make an incense offering to the Lord. So when Christians suffer through things in life that would grind them to powder, and when they go thru the fire of trials and tribulations all the time still praising God. That is like sweet incense to the Lord
In Rev_8:3 And another angel came and stood at the altar, having a golden censer; and there was given unto him much incense, that he should offer it with the prayers of all saints upon the golden altar which was before the throne.
Rev_8:4 And the smoke of the incense, which came with the prayers of the saints, ascended up before God out of the angel's hand.
This offering would not be for sin but probably a praise offering which is like incense to the Lord.
Heb_10:10 By the which will we are sanctified through the offering of the body of Jesus Christ once for all.
Heb_10:11 And every priest stands daily ministering and offering oftentimes the same sacrifices, which can never take away sins:
Heb_10:14 For by one offering he hath perfected for ever them that are sanctified.
Heb_10:18 Now where remission of these is, there is no more offering for sin.
Also with respect I don't see how having Roman Catholic priests are scriptural. Having a priest to get to God is old covenant. The old covenant is about having priests between man and God. The new covenant is about direct access to God. That is what is symbolized by the veil in the temple being rent in two signifying a new and living way.
Heb_10:20 By a new and living way, which he hath consecrated for us, through the veil, that is to say, his flesh;
At Sanai Israel was offered to be kings and priests of the Melchisedec order like Abraham and David. God wanted them to have a personal relationship with him like he had with Moses and Abraham. But they were rebellious and were afraid to talk to God directly and they wanted to be like other nations having ceremonies and priests. Later they did not want God as their king and they wanted a human king. God allowed this because he allws free will and so people will realize that getting what they want is not always a good thing. So they were burdened down by both ceremonies and taxes.
The old covenant did serve as symbols of the spiritual concepts of the new covenant.
Heb 8:3 For every high priest is ordained to offer gifts and sacrifices: wherefore it is of necessity that this man have somewhat also to offer.
Heb 8:4 For if he were on earth, he should not be a priest, seeing that there are priests that offer gifts according to the law:
Heb 8:5 Who serve unto the example and shadow of heavenly things, as Moses was admonished of God when he was about to make the tabernacle: for, See, saith he, that thou make all things according to the pattern shewed to thee in the mount.
Heb 8:6 But now hath he obtained a more excellent ministry, by how much also he is the mediator of a better covenant, which was established upon better promises.
Heb 8:7 For if that first covenant had been faultless, then should no place have been sought for the second.
Heb 8:8 For finding fault with them, he saith, Behold, the days come, saith the Lord, when I will make a new covenant with the house of Israel and with the house of Judah:
Heb 8:9 Not according to the covenant that I made with their fathers in the day when I took them by the hand to lead them out of the land of Egypt; because they continued not in my covenant, and I regarded them not, saith the Lord.
Heb 8:10 For this is the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people:
Heb 8:11 And they shall not teach every man his neighbour, and every man his brother, saying, Know the Lord: for all shall know me, from the least to the greatest.
Heb 8:12 For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more.
Heb 8:13 In that he saith, A new covenant, he hath made the first old. Now that which decayeth and waxeth old is ready to vanish away.
To go to a man to get to God is so old covenant. Christ died so we could have access to God right in the Holy of Holies.
Also I don't understand how going to the Roman Catholic church which worship idols and who worships the queen of heaven could possibly represent a pure offering.
People all over the world worship the Queen of heaven which is an abomination to God.
Constantine wanted to have better control over the masses so he blended the queen of heaven worship with Chrisitanity to consolidate the people together. Thus the Roman Catholic church was born. The people still kept coming to worship their pagan idols but they changed the names from pagan queen of heaven to Mary. That is why you see depictions similar to Isis in RC churches.
Jer 7:16 Therefore pray not thou for this people, neither lift up cry nor prayer for them, neither make intercession to me: for I will not hear thee.
Jer 7:17 See thou not what they do in the cities of Judah and in the streets of Jerusalem?
Jer 7:18 The children gather wood, and the fathers kindle the fire, and the women knead their dough, to make cakes to the queen of heaven, and to pour out drink offerings unto other gods, that they may provoke me to anger.
Jer 7:19 Do they provoke me to anger? says the LORD: do they not provoke themselves to the confusion of their own faces?
We see in the Old testament Solomon worshiped Ashtoreth
"Astarte ... a Semitic goddess of fertility and sexual love, worshiped by the Phoenicians and others: see also ASHTORETH, ISHTAR."
"Ashtoreth ... the ancient Phoenician and Syrian goddess of love and fertility: identified with ASTARTE."
"Ishtar ... see ASHTORETH ... the goddess of love, fertility, and war."
From whom the RC church gets Easter.
I will rend the kingdom out of the hand of Solomon, and will give ten tribes to thee:
1Ki 11:32 (But he shall have one tribe for my servant David's sake, and for Jerusalem's sake, the city which I have chosen out of all the tribes of Israel:)
1Ki 11:33 Because that they have forsaken me, and have worshipped Ashtoreth the goddess of the Zidonians, ...and have not walked in my ways, to do that which is right in mine eyes, and to keep my statutes and my judgments, as did David his father.
There are many scripture against the worship of Ashtoreth and Baal
God hates mixtures so how could the RC church with it's mix of pagan and Christian practices ever provide a pure offering?