It means not to put anyone in God's place, that devotion to God is unique in its closeness.
"All names which in the Scriptures are applied to Christ, by virtue of which it is established that he is over the church, all the same names are applied to the Pope."(Source: Robert Bellarmine, On the Authority of Councils, Volume 2: 266.)
"The Pope is not only the representative of Jesus Christ, but he is Jesus Christ, Himself, hidden under the veil of flesh." (Source: Catholic National (July, 1895))
"...the Pope is as it were God on earth, sole sovereign of the faithful of Christ, chief of kings, having plenitude of power." (Source: Lucius Ferraris, in "Prompta Bibliotheca Canonica, Juridica, Moralis, Theologica, Ascetica, Polemica, Rubristica, Historica", Volume V, article on "Papa, Article II", titled "Concerning the extent of Papal dignity, authority, or dominion and infallibility", #1, 5, 13-15, 18, published in Petit Montrouge (Paris) by J. P. Migne, 1858 edition.)
"We confess that the Pope has power of changing Scripture and of adding to it, and taking from it according to his will." (Source: Roman Catholic Confessions for Protestants Oath, Article XI, (Confessio Romano- Catholica in Hungaria Evangelicis publice praescripta te proposita, editi a Streitwolf), as recorded in Congressional Record of the U.S.A., House Bill 1523, Contested election case of Eugene C. Bonniwell, against Thos. S. Butler, Feb. 15, 1913.)
Note that these quotes are coming from catholic sources. However, even if you did agree that these quotes are true, catholics will not denounce them. The Roman Catholic Church requires yourself and it's followers to have absolute obedience to the pope and the Roman Catholic Church at all costs. I think you would probably agree with St. Catherine of Siena when she said:
"Even if the Pope were Satan incarnate, we ought not to raise up our heads against him, but calmly lie down to rest on his bosom. He who rebels against our Father is condemned to death, for that which we do to him we do to Christ: we honor Christ if we honor the Pope; we dishonor Christ if we dishonor the Pope. I know very well that many defend themselves by boasting: 'They are so corrupt, and work all manner of evil!' But God has commanded that, even if the priests, the pastors, and Christ-on-earth were incarnate devils, we be obedient and subject to them, not for their sakes, but for the sake of God, and out of obedience to Him." (Source: St. Catherine of Siena, SCS, p. 201-202, p. 222, quoted in Apostolic Digest, by Michael Malone, Book 5: “The Book of Obedience”, Chapter 1: “There is No Salvation Without Personal Submission to the Pope”)