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 XVIRespecting the environment does not mean considering material or animal nature more important than man. Rather, it means not selfishly considering nature to be at the complete disposal of our own interests, for future generations also have the right to reap its benefits and to exhibit towards nature the same responsible freedom that we claim for ourselves. Nor must we overlook the poor, who are excluded in many cases from the goods of creation destined for all.
Pope Benedict XVIThe deepest poverty is the inability of joy, the tediousness of a life considered absurd and contradictory. This poverty is widespread today, in very different forms in the materially rich as well as the poor countries. The inability of joy presupposes and produces the inability to love, produces jealousy, avarice - all defects that devastate the life of individuals and of the world. This is why we are in need of a new evangelization - if the art of living remains an unknown, nothing else works... this art can only be communicated by [one] who has life - he who is the Gospel personified.
Pope Benedict XVI