When you write "us" what specific denomination or sect do you represent as there are thousands of them and they certainly do not all agree with each other or you. As for your your contention with respect to 1 Cor 4, I found it useful to read more context than the verse you centered on to attack the Catholic teaching on Mary, who is forever the blessed virgin of Israel and mother of God with us, the LORD Jesus Christ. The context of 1 Cor 1 shows Paul was upholding one holy catholic apostolic church and the contentions were unscriptural. Your use of 1 Cor 4 seems quite out of place, to say the least.
Now I beseech you, brethren, by the name of our Lord Jesus Christ, that ye all speak the same thing, and that there be no divisions among you; but that ye be perfectly joined together in the same mind and in the same judgment. For it hath been declared unto me of you, my brethren, by them which are of the house of Chloe, that there are contentions among you. Now this I say, that every one of you saith, I am of Paul; and I of Apollos; and I of Cephas; and I of Christ. Is Christ divided? was Paul crucified for you? or were ye baptized in the name of Paul?
The contentions are clear since Paul spelled them out...And then comparing scripture with scripture, the conversation unfolds...
1Co_1:12 Now this I say, that every one of you saith, I am of Paul; and I of Apollos; and I of Cephas; and I of Christ.
1Co 3:4 For while one saith, I am of Paul; and another, I am of Apollos; are ye not carnal?
The contentions were over who had the most authority...Who was the holiest...
And Paul says, 'stick with the scriptures'...If one was over the other, or higher in rank than another, God would have told you in the scriptures...Do not go above what is written in the scriptures...Whether it be Peter, Paul or Mary...Pretty simple stuff there...And Paul say when you do this, it is carnal...