Agreed, no finite man has ever been nor ever will be infallible no matter what emotion of omniscience he or she may express.  All humans make mistakes and it is in learning from these mistakes that the Holy Spirt shows us a better way to live.  Those who believe they are in any way infallible can not learn from their own mistakes indeed they deify themselves.  We have lots of little Golden Calves running around the RCC.  To bad because idolatry is indeed a great sin.