Bishops must guide their faithful to use their vote to oppose efforts to legalize abortion and euthanasia, Pope Benedict told bishops from Brazil.

"Dear brother bishops, to defend life we must not fear hostility or unpopularity, and we must refuse any compromise or ambiguity which might conform us to the world's way of thinking," the pope said Oct. 28 during a meeting with bishops from northeast Brazil.

Pope Benedict told the Brazilian bishops that while direct involvement in politics is the responsibility of the laity, "when the fundamental rights of the person or the salvation of souls requires it, pastors have a serious duty to make moral judgments even in political matters."