I do, but it's hard for a single man's mind to comprehend the whole truth. I think generally you can only master a few aspects of it. I believe Catholicism is the correct religion, but I still admit that there have been many great minds from different religious traditions.
This is actually an integral part of the Catholic intellectual tradition, which is why Catholic philosophy (see St Thomas Aquinas for example) can incorporate insights from pagans, Muslims and Jews. Hans Urs von Balthasar took inspiration from an even wider variety of thinkers. I could go on but hopefully I've made my point.