"The great leaders of the people of God, like Moses, have always left room for doubt," he said. "You must leave room for the Lord."
But church leaders, including himself, haven't always practiced humility, the pope admitted.
Many of the bad decisions he made while leading Catholics in Argentina came about because of his "authoritarianism and quick manner of making decisions," the pope said.
That won't happen again, Francis said, as he begins to steer the church in a new direction.
He didn't offer an exact course, but he said change will come. Sooner or later.
"Many think that changes and reforms can take place in a short time," he said. "I believe that we always need time to lay the foundations for real, effective change. And this is the time of discernment."