3. What positive proof have you that the Catholic Church is the only true Church?
The proof, lies in the fact that the Catholic Church alone corresponds exactly to the exact religion established by Christ. Now the Christian religion is that religion which
(a) Was founded by Christ personally;
(b) Has existed continuously since the time of Christ;
(c) Is Catholic or universal, in accordance with Christ's command to go to all the world and teach all nations;
(d) Demands that all her members admit the same doctrine;
(e) Exercises divine authority over her subjects, since Christ said that if a man would not hear the Church he would be as the
Now the Catholic Church alone can claim
(a) To have been founded by Christ personally. All other Churches disappear as you go back through history. Christ said, "Thou art Peter, and upon this rock I will build My Church" (Matt. XVI, 18). There are many claimants to the honor of being Christ's Church. But among all non-Catholic Churches, we find one built on a John Wesley; another on a Martin Luther; another on a Mrs. Eddy, etc. But the Catholic Church alone can possibly claim to have been built on Peter, the chief of the Apostles, and one-time Bishop of Rome.
(b) To have existed in all the centuries since Christ.
(c) That every one of her members admits exactly the same essential doctrines.
(d) To be Catholic or universal.
(e) To speak with a voice of true authority in the name of God.
4. Where in Scripture does it mention that Christ founded any such system?

In general, Christ terms His Church a kingdom which supposes some organized authority. However, the explicit steps in the establishing of an authoritative hierarchy are clear. Christ chose certain special men. "You have not chosen Me: but I have chosen you" (Jn. XV., 16). He gave them His own mission. " As the Father hath sent Me, I also send you" (Jn. XX., 21). This commission included His teaching authority: “Teach all nations Whatsoever I have commanded you," (Matt. XXVIII, 19-20); His power to sanctify-*Baptizing them," (Matt. XXVII., 19-) forgiving sin, "Whose sins you shall forgive, they are forgiven," (Jn. XX., 23) offering sacrifice, "Do this for a commemoration of Me" (1 Cor, XI., 24); His legislative or disciplinary power—“He who hears you, hears Me, and he who despises you despises Me," (LK. X., 16); "Whatsoever you shall bind on earth, shall be bound also in Heaven," (Matt. XVIII.,18). "If a man will not hear the Church, let him be to thee as the heathen," (Matt. XVIN, 17).
The Apostles certainly exercised these powers from the beginning. Thus we read in the Acts of the Apostles, "They were all persevering in the doctrine of the Apostles," (I., 42). St. Paul himself did not hesitate to excommunicate the incestuous Corinthian (1 Cor. V, 3-5). And he wrote to the Hebrews, "Obey your prelates, and be subject to them" (Heb. XIIII, 17.)
Source:
True Church Quizzes
(A Catholic Response to Protestant Objections concerning The One True Church). By: Fathers Rumble and Carty. Radio Replies Press, St. Paul 1, Minnesota, U.S.A. 1943
IMPRIMATUR Joannes Gregorius Murray Archiepiscopus Sancti Pauli
http://www.catholicapologetics.info/apologetics/protestantism/true.htm
