In Christianity, different groups disagree about who can be a priest. Protestants believe that any baptized believer can become a priest (though denominations can vary depending on the question of gender), and that anyone can talk directly to God. Ordination is not necessarily needed to become a priest, however, the unordained are generally referred to as, "Preachers," and the term "Pastor" can be used interchangeably.
In contrast, Roman Catholics believe that only male believers can become priests and that they must receive special training because they intercede between God and His people. Pope Paul VI in 1964 issued a papal bull called Lumen Gentium: In it, he stated the position the Roman Catholic church held after the Second Vatican Council:
Christ the Lord, High Priest taken from among men, made the new people "a kingdom and priests to God the Father".The baptized, by regeneration and the anointing of the Holy Spirit, are consecrated (..) a holy priesthood, in order that through all those works which are those of the Christian man they may offer spiritual sacrifices and proclaim the power of Him who has called them out of darkness into His marvelous light.