We revere Mary because she was the virgin mother of Jesus Christ. The saints are seen as good role models for us to follow and look up to. The pope is highly respected because he follows a line of individuals that began with Peter the Apostle, a man hand picked by Jesus to run His Church but not worshipped. While I can not speak for every Catholic, I personally read the Bible for its teachings on various subjects and for inspiration. At mass every reading is from the Bible and every part of the mass is Biblically inspired.
Catholics believe the Bible is divinely inspired but written by human hands.
Infallibility of Priest Priests, like you and me, are human and because they are human, they do make mistakes. These materials are not endorsed, approved, sponsored, or provided by or on behalf of the University of Arkansas, Fayetteville.