"The Catholic Cardinal Gibbons, in Faith of Our Fathers, pg. 111, said, "You may read the Bible from Genesis to Revelation, and you will not find a single line authorizing the sanctification of Sunday. The Scriptures enforce the religious observance of Saturday, a day which we (The Roman Catholic Church) never sanctify."
Jesus, on His life here on earth, kept the Sabbath. The Jews are the chosen ones because they are one of the few (remnant) that would still be observant in the last days. Remember what Jesus said? "IF ye love me, keep My commandments".
He is the very same James Cardinal Gibbons.
It is always very revealing and somewhat saddening when some Protestants quote Catholic Clergy and authors as though they had actually read the works themselves. The quotes are always out of context and errors are repeated from website to website and post to post. It shows a contempt, or at least a disregard, for the truth, which as the Catechism states, is God who is truth itself.
The first problem with your citation is that the quote is not on page 111, it is actually on page 97 (a dead giveaway as to the source of your material). The second is the lack of context. Below is an extended excerpt of the entire page 97 from Faith of our Fathers:
Would it not be extremely hazardous to make a long voyage in a ship in which the officers and crew are fiercely contending among themselves about the manner of explaining the compass and of steering their course? How much more dangerous is it to trust to contending captains in the journey to heaven! Nothing short of an infallible authority should satisfy you when it is a question of steering your course to eternity. On this vital point there should be no conflict of opinion among those that guide you. There should be no conjecture. But there must be always someone at the helm whose voice gives assurance amid the fiercest storms that all is well.
Third—A rule of faith, or a competent guide to heaven, must be able to instruct in all the truths necessary for salvation. Now the Scriptures alone do not contain all the truths which a Christian is bound to believe, nor do they explicitly enjoin all the duties which he is obliged to practice. Not to mention other examples, is not every Christian obliged to sanctify Sunday and to abstain on that day from unnecessary servile work? Is not the observance of this law among the most prominent of our sacred duties? But you may read the Bible from Genesis to Revelation, and you will not find a single line authorizing the sanctification of Sunday. The Scriptures enforce the religious observance of Saturday, a day which we never sanctify. The Catholic Church correctly teaches that our Lord and His Apostles inculcated certain important duties of religion which are not recorded by the inspired writers.150 For instance, most Christians pray to the Holy Ghost, a practice which is nowhere found in the Bible.
We must, therefore, conclude that the Scriptures alone cannot be a sufficient guide and rule of faith because they cannot, at any time, be within the reach of every inquirer; because they are not of themselves clear and intelligible even in matters of the highest importance, and because they do not contain all the truths necessary for salvation.