"The Pope is not simply the representative of Jesus Christ. On the contrary, he is Jesus Christ Himself, under the veil of the flesh, and who by means of a being common to humanity continues His ministry amongst men ... Does the Pope speak? It is Jesus Christ Who is speaking. Does he teach? It is Jesus Christ Who teaches. Does he confer grace or pronounce an anathema? It is Jesus Christ Himself Who is pronouncing the anathema and conferring the grace. Hence consequently, when one speaks of the Pope, it is not necessary to examine, but to obey: there must be no limiting the bounds of the command, in order to suit the purpose of the individual whose obedience is demanded: there must be no cavilling at the declared will of the Pope, and so invest it with quite another than that which he has put upon it: no preconceived opinions must be brought to bear upon it: no rights must be set up against the rights of the Holy Father  to teach and command; his decisions are not to be criticized, or his ordinances disputed. Therefore by Divine ordination, all, no matter how august the person may be — whether he wear a crown or be invested with the purple, or be clothed in the sacred vestments: all must be subject to Him Who has had all things put under Him." -Evangelical Christendom, January 1, 1895,  pg. 15, published in London by J. S. Phillips.

Quotes from The Vatican

"Question - Have you any other way of proving that the church (Roman Catholic) has power to institute festivals of precept?

"Answer - Had she not such power, she could not have done that in which all modern religionists agree with her - she could not have substituted the observance of Sunday, the first day of the week, for the observance of Saturday, the seventh day, a change for which there is no scriptural authority." A Doctrinal Catechism. by Stephen Keenan,pg. 174.

"Question - Which is the Sabbath day?

"Answer - Saturday is the Sabbath day.

"Question - Why do we observe Sunday instead of Saturday?

"Answer - We observe Sunday instead of Saturday because the Catholic Church, in the Council of Laodicea (A.D. 364), transferred the solemnity from Saturday to Sunday." The Convert's Catechism of Catholic Doctrine, pg. 50, 3rd ed.