Churches Should Find Unity Against Gay Marriage, Pope Says.

ROME, ITALY -- At a prayer service Thursday Pope Benedict called for a dialogue among Christians in order to make the churches work together against such evils of the world as video games and same-sex marriages.

"Honest and loyal dialogue constitutes the typical and indispensable instrument in the search for unity," the pope said.

"Christians are praying so that all the disciples of Christ be one, so they can give harmonious testimony to the men and women of our times," he continued.

Pope Benedict has stated that he will be devoting much of his papacy to achieve Christian unity, and he has been meeting with representatives for other churches around the world.

Pope Benedict met with the spiritual leader of the world's Orthodox Christians in Istanbul two months ago. Pope John Paul II was never able to mend the Vatican's relationship with the Russian Orthodox church.