See Acts 18 for background on Paul in Corinth.
Ch. 1 v. 10 Paul warns against divisions in the Church. (Would Paul, or JESUS, have approved of the Protestant Revolt?)
v. 11-13 Paul warns against the cult of personality. (Following a specific preacher that we like vs. following the teachings of the Faith.) (As Catholics, we attend Mass to worship God, and to receive the grace of Eucharist to give us strength for our mission.)