What is the difference between Catholicism or Catholicity and Christianity?
Well, the main difference is the priesthood. This will be a long post, with many points, so bear with me! I will get a lot of hate for it, but you deserve all points of view to have your question answered.
Alright, so starting with the priesthood. So, God is very specific about who He allows to be priest, as we find out by Korah's Rebellion. Which was literally where Korah, family and friends thought that since they too had a relationship with God, and God also talked with them in dreams, that they had the right and authority to offer sacrifices and atone for their own sins instead of the priesthood that God established through Aaron. God quickly proved them wrong by having the ground swallow up their entire families, and instantly smiting down the ones in the tabernacle that were offering up sacrifices, and giving atonement for their own sins in the place of Aaron.
See, now back when the priesthood was still in the hands of Levites, of man, Aaron and his lineage (his sons) were the only priesthood God commanded, until Jesus came to earth. It was specific to Levites, and more specifically, the Levitical sons of Aaron.
Hebrews 7:12-15
12For the priesthood being changed, there is made of necessity a change also of the law.
13For he of whom these things are spoken pertaineth to another tribe, of which no man gave attendance at the altar.
14For
it is evident that our Lord sprang out of Juda; of which tribe Moses spake nothing concerning priesthood.
15And it is yet far more evident: for that after the similitude of Melchisedec there ariseth another priest,
16Who is made, not after the law of a carnal commandment, but after the power of an endless life.
In the verses above, we see that although Moses didn't speak of the priesthood coming being given to one born of the tribe of Judah (Jesus, who was of the tribe of Judah), Jesus was made Priest.
Then, later in the chapter:
Hebrews 7:22-28
22By so much was Jesus made a surety of a better testament.
23And they truly were many priests, because they were not suffered to continue by reason of death:
24But this
man, because he continueth ever, hath an unchangeable priesthood.
25Wherefore he is able also to save them to the uttermost that come unto God by him, seeing he ever liveth to make intercession for them.
26For such an high priest became us,
who is holy, harmless, undefiled, separate from sinners, and made higher than the heavens;
27Who needeth not daily, as those high priests, to offer up sacrifice, first for his own sins, and then for the people's: for this he did once, when he offered up himself.
28For the law maketh men high priests which have infirmity; but the word of the oath, which was since the law,
maketh the Son, who is consecrated for evermore.
Here, we see that Jesus was made Priest, because
men being priest is temporary, and likely to become flawed. Their sacrifices are temporary, and their priesthoods are temporary, but Jesus's Priesthood is permanent, and His sacrifice is permanent.
So, my point, if Jesus is our Priest, and is flawless in doing His job, wouldn't
attempting to make a priesthood out of men, again (the very same thing Jesus did away with) be denying Jesus's job that He's doing on our behalf?
God is very particular over
who is acting on man's behalf as priest. Before Jesus's sacrifice, it
had to be the Levitical sons of Aaron. Anyone that tried to do it aside from them, were considered heeding to demons, sacrificing to demons, and in some cases God just straight up smote down entire camps of people because of it. How much more would He be against people doing the same thing, but to Jesus's Priesthood, instead of man's priesthood?
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History
If you look into the history of catholicism, it's very popular for introducing paganism into the worship of God in order to make it "easier for them to come to Jesus".
You see, Rome back in the day (1st-4th centuries) was riddles with pagans. The emperors, constantine, etc, although history paints them to be christians, when you actually search the matters out for yourself, without relying on biased christian sources, you see that although some of them (constantine especially)
professed christianity, they still openly worshipped their pagan "deities". Constantine worshipped the sun, hence him passing a law in 321 ad, that forced all christians to worship on the "venerable day of the sun".
If they didn't, and were found worshipping on the biblical sabbath, they'd be excommunicated (forced by humiliation, force, or public outcry and revolt out of the city), which then evolved into putting those found keeping the biblical sabbath to death. I can get into more of the history behind this, but the post is long enough. I'll at least post a quote from Constantine about this though, since I know the hatred and disagreement I'll get involving it.
First Sunday Law enacted by Emperor Constantine -
March, 321 A.D.
On the venerable Day of the Sun let the magistrates and people residing in cities rest, and let all workshops be closed. In the country, however, persons engaged in agriculture may freely and lawfully continue their pursuits; because it often happens that another day is not so suitable for grain-sowing or for vine-planting; lest by neglecting the proper moment for such operations the bounty of heaven should be lost. (Given the 7th day of March, Crispus and Constantine being consuls each of them for the second time [A.D. 321].)
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St. Peter's square
There is also, blatant pagan symbolism in St. Peter's square. I'll upload a picture, and show you my point.
Now, in one of the pictures from far off, you can see the obelisk, and in the other from overhead you can see the sun wheel.
What's the big deal?
Well, paganism started essentially with the offspring of Ham. Egypt, came from Ham. My point is, there's ancient mythology regarding the sun god's death, and long story short, he was cut into 14 pieces, cast across the earth, and his penis was thrown into the nile river. His penis was believed to be the representation of his power, and his wife, Semiramis hers was her womanly equivalent. One, historically (and you can easily verify this by researching into it, this is what egyptians, and pagans every since that venerate the sun have and still do believe) they'd always use obelisks to represent the sun god's member, and circles, or wreathes to represent the womb. Why? Because, there have been, and still are people, that desire to bring about once more the sun god's coming. There is no sun god though, there is only the enemy.
What's even more weird though, is when you get into it, all societies that worshipped the sun god throughout history, all attributed the same exact birthday to him, all of them looked the same, all of them had the same customs, the same story, it's the same being that they're worshipping. You can verify all of this by looking into what I'm saying on google, it's fascinating, and gives us a look into the minds of these people.
Back to obelisks though.
In fact, there's actually an obelisk that came from egypt, that in 1587 pope Sixtus V found, had repaired, and placed in the Piazza S. Giovanni in Lateran. It literally still stands there today.
Even the cap that the popes wear, comes straight from the cap that sun worshipping priests wore in Egypt. We're supposed to be using the bible as our sole source of authority, where in the bible does it say to wear one of those? Not only does it
not mandate any such thing, but it's actually against covering your head as a man during prayer, because our head is the glory of Jesus. Women are actually (according to scripture) supposed to cover their head, because their head is the glory of man, which is to be covered.
1 Corinthians 11:4-7
4
Every man who prays or prophesies with his head covered dishonors his head. 5 And every woman who prays or prophesies with her head uncovered dishonors her head: for that is even all one as if she were shaven.
6For if the woman be not covered, let her also be shorn: but if it be a shame for a woman to be shorn or shaven, let her be covered.
7For a man indeed ought not to cover his head, forasmuch as he is the image and glory of God: but the woman is the glory of the man.
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Pope
Now, the pope, is someone Catholics feel has a direct communication with God, and that disrespecting the pope, is straight up disrespecting God. That, the pope is an extension of God essentially, what he says is absolute, and you can't question it. Well, the pope today, is trying to get us to mix all religions together. Pope Francis himself has said that muslims and christians worship the same God, which obviously isn't true. Then, if you go back at some of the sayings of the popes throughout history:
Pope Innocent III "We may according to the fullness of our power, dispose of the law and dispense above the law. those whom the Pope of Rome doth separate, it is not a man that separates them but God. For the Pope holdeth place on earth, not simply of a man but of the true God."
The Lateran Council addressing Pope Julius II (note, this is how they viewed their pope) - "Take care that we lose not that salvation, that life and breath which thou has given us, for thou art our shepherd, thou art our physician, thou art our governor, thou art our husbandman, thou art finally another God on earth"
Pope Nicholas: "I am in all and above all, so that God Himself and I, the vicar of God, hath both one consistory, and I am able to do almost all that God can do... wherefore, if those things I do be said not to be done of man, but of God, what do you make of me but God?"
The RC New York catechism states: "The pope takes the place of Jesus Christ on earth... by divine right the Pope has supreme and full power in faith, in morals over each and every pastor and his flock. He is the true vicar, the head of the entire church, the father and teacher of all Christians. He is the infallible ruler, the founder of dogmas, the author of and the judge of councils;"
Where are any of the things said above in scripture? Absolutely, positively, nowhere.
There are so, so,
SO many more of these, that I can't even begin to type them all. My point is, catholicism, is the biggest deception in all of christianity. Based on that last quote, it's more of a cult, than anything. Because anything the pope says, even if it's contrary to scripture, people blindly eat it up, because the pope said. We've been conditioned and indoctrinated to believe that the pope is, as that quote said "infallible" that anything and everything he says is truth, when most of what RCC does contradicts scripture. It has caused christians to continually break the 4th commandment, with no other support other than the catholic church demanding it be kept on the sunday.
James Cardinal Gibbons,
Archbishop of Baltimore (1877-1921),
in a signed letter.
"Is Saturday the seventh day according to the Bible and the Ten Commandments? I answer yes. Is Sunday the first day of the week and did the church change the event day - Saturday - for Sunday, the first day? I answer yes. Did Christ change the day? I answer no!
Faithfully yours, J. Card. Gibbons."