A Little Tid-Bit From The Catechism of the Council of Trent
"The first thing is ever to recollect that all Christian knowledge is reduced to one single head, or rather, to use the words of the Apostle, this is eternal life: That they may know thee, the only true God, and Jesus Christ, whom thou hast sent. A teacher in the Church should, therefore, use his best endeavours that the faithful earnestly desire to know Jesus Christ, and him crucified, that they be firmly convinced, and with the most heartfelt piety and devotion believe, that there is no other name under heaven given to men, whereby we must be saved, for he is the propitiation for our sins."
(cf. the intro to the Catechism of the Council of Trent)
Here's the Link to the Catechism of Trent