since it is not possible for any human being to fully understand the Truth as it has been revealed by God and as it is preserved and taught by the Catholic Church, the answer would be no, or we are all doomed. Augustine and Thomas, two of the greatest saints of the Church as well as two of the greatest intellects in human history, spent their last days in almost wordless awe as they confronted the reality that even they comprehended no more of God and His Truth than a rock on the seashore being washed by the waves understands of the vastness of the ocean and its wonders. No, the religion is not God, and the Church is not God, but it is the repository on earth of His authority to teach and transmit the truth, and yes we are obligated to assent to the truth and to that authority. No we are not obligated to understand it all.