If a Pope clearly realizes that he is no longer physically, psychologically, and spiritually capable of handling the duties of his office, then he has a right and, under some circumstances, also an obligation to resign.
Pope Benedict XVIThe ways of the Lord are not easy, but we were not created for an easy life, but for great things, for goodness.
Pope Benedict XVIOur knowledge of Jesus is in need above all of a living experience: Another person's testimony is certainly important, as in general the whole of our Christian life begins with the proclamation that comes to us from one or several witnesses. But we ourselves must be personally involved in an intimate and profound relationship with Jesus.
Pope Benedict XVI[Non-Catholic Christians are] in a gravely deficient situation in comparison with those who, in the [Roman Catholic] church, have the fullness of the means of salvation.
Pope Benedict XVI