Jesus said, "I am the way, the life and the truth." That is the Catholic truth we believe in. Jesus added that NO one came unto the Father BUT by Him. Is that "Catholic" truth, as well, or do you believe people can be saved who don't believe in Jesus but who are good and who live according to their own consciences?
In addition:
"Amen, amen, I say to you, unless you eat the flesh of the Son of Man and drink his blood, you do not have life within you" (Jn 6:53).