John O'Brien, Ph.D., LL.D.: "But since Saturday, not Sunday, is specified in the Bible, isn't it curious that non-Catholics who profess to take their religion directly from the Bible, and not the Church, observe Sunday instead of Saturday? Yes of course, it is inconsistent; but this change was made about 15 centuries before Protestantism was born, and by that time the custom was universally observed. They have continued the custom, even though it rests upon the authority of the Catholic Church and not upon an explicit text in the Bible. That observance remains as a reminder of the Mother Church from which the non-Catholic sects broke away - like a boy running away from home but still carrying in his pocket a picture of his mother or a lock of her hair." Faith of Millions, pp. 543 and 544.
As for the rest of this thread, it is readily apparent to anyone who can doff the rosary colored glasses that I had no intention or inclination of going down this road on this thread. In fact, I didn't even want it to go any further than my original post, where I hoped Salvation would oblige me and post a thread indicating the importance of the Holy Scriptures to the Catholic Church.
How oddly interesting! Why, my copy of “The Faith of Millions” by O’Brien only has 416 pages! Funny how the quote you cite is allegedly found on pages 543 and 544 of a 416 page book...