“It cannot be difficult to find out which is the true religion, if only it be sought with an earnest and unbiased mind; for proofs are abundant and striking. We have, for example, the fulfilment of prophecies, miracles in great numbers, the rapid spread of the faith in the midst of enemies and in face of overwhelming obstacles, the witness of the martyrs, and the like. From all these it is evident that the only true religion is the one established by Jesus Christ Himself, and which He committed to His Church to protect and to propagate. For the only-begotten Son of God established on earth a society which is called the Church, and to it He handed over the exalted and divine office which He had received from His Father, to be continued through the ages to come. “As the Father hath sent Me, I also send you.”‘ “Behold I am with you all days, even to the consummation of the world.”(6) Consequently, as Jesus Christ came into the world that men “might have life and have it more abundantly,”(7) so also has the Church for its aim and end the eternal salvation of souls, and hence it is so constituted as to open wide its arms to all mankind, unhampered by any limit of either time or place. “Preach ye the Gospel to every creature.”(8) Over this mighty multitude God has Himself set rulers with power to govern, and He has willed that one should be the head of all, and the chief and unerring teacher of truth, to whom He has given “the keys of the kingdom of heaven.”(9) “Feed My lambs, feed My sheep.”(10) “I have prayed for thee that thy faith fail not.”(11)”
6 Matt. 28:20, 7 John 10:10, 8 Mark 16:15, 9 Matt. 16:19, 10 John 21:16-17, 11 Luke 22:32.
Pope Leo XIII, IMMORTALE DEI, 1 November 1885
If Jesus is a liar, then He isn’t divine. If He isn’t divine, then Catholicism is a lie.
“But it is pride which exercises an incomparably greater sway over the soul to blind it and plunge it into error, and pride sits in Modernism as in its own house, finding sustenance everywhere in its doctrines and an occasion to flaunt itself in all its aspects. It is pride which fills Modernists with that confidence in themselves and leads them to hold themselves up as the rule for all, pride which puffs them up with that vainglory which allows them to regard themselves as the sole possessors of knowledge, and makes them say, inflated with presumption, We are not as the rest of men, and which, to make them really not as other men, leads them to embrace all kinds of the most absurd novelties; it is pride which rouses in them the spirit of disobedience and causes them to demand a compromise between authority and liberty; it is pride that makes of them the reformers of others, while they forget to reform themselves, and which begets their absolute want of respect for authority, not excepting the supreme authority. No, truly, there is no road which leads so directly and so quickly to Modernism as pride.”
Pope St. Pius X, PASCENDI DOMINICI GREGIS, 8 September 1907
And finally, back to Leo XIII:
“This wicked dragon pours out, as a most impure flood, the venom of his malice on men of depraved mind and corrupt heart, the spirit of lying, of impiety, of blasphemy, and the pestilent breath of impurity, and of every vice and iniquity. These most crafty enemies have filled and inebriated with gall and bitterness the Church, the spouse of the immaculate Lamb, and have laid impious hands on her most sacred possessions. In the Holy Place itself, where the See of Holy Peter and the Chair of Truth has been set up as the light of the world, they have raised the throne of their abominable impiety, with the iniquitous design that when the Pastor has been struck, the sheep may be.”
You can read more about that last quote HERE.