Lets not believe that a priest came from an another planet , he is a perfect being , free from all human weaknesses , free from any faults , temptation , sin. He was also made from the same substance, material just like any other human being . Only in the delivery of the sacraments is there an assurance , that even his sinfulness cannot prevent the fruit of grace , whilst in other actions the human aspect of his weakness , fallibility can leave a mark. 