Whether there can be anything pernicious in the worship of the true God?

Objections

Objection 1 : It would seem that there cannot be anything pernicious in the worship of the true God. It is written (Joel 2:32): "Everyone that shall call upon the name of the Lord shall be saved." Now whoever worships God calls upon His name. Therefore all worship of God is conducive to salvation, and consequently none is pernicious.
Objection 2 : Further, it is the same God that is worshiped by the just in any age of the world. Now before the giving of the Law the just worshiped God in whatever manner they pleased, without committing mortal sin: wherefore Jacob bound himself by his own vow to a special kind of worship, as related in Genesis 28. Therefore now also no worship of God is pernicious.
Objection 3 : Further, nothing pernicious is tolerated in the Church. Yet the Church tolerates various rites of divine worship: wherefore Gregory, replying to Augustine, bishop of the English (Regist. xi, ep. 64), who stated that there existed in the churches various customs in the celebration of Mass, wrote: "I wish you to choose carefully whatever you find likely to be most pleasing to God, whether in the Roman territory, or in the land of the Gauls, or in any part of the Church." Therefore no way of worshiping God is pernicious.