Which Is The One True Church?

Now, in order to determine which is this one true Church, it is necessary to examine which is the Church first founded by Jesus Christ, for when this is ascertained, it must be confessed that this one alone is the true Church which, having once been the true Church must always have been the true Church and must forever be the true Church. For to this first Church has been made the promise of the Savior that the gates of Hell would never be able to overturn it [Matt 16:18]. - Saint Alphonsus Liguori