The divine word is the only safe directory

No acts of worship can properly be called holy, but such as the Almighty has enjoined. No man, nor any body of men have any authority to invent rites and ceremonies of worship; to change the ordinances which he has established; or to invent new ones. This appears to us so clear a case, that we need not to enlarge on it. The divine word is the only safe directory in what relates to his own immediate service. The question is not what we may think becoming, decent or proper, but what our gracious Master has authorized as such. In matters of religion, nothing bears the stamp of holiness but what God has ordained.

John Fawcett, an English Baptist pastor (1739-1817) in The Holiness which Becometh the House of the Lord