NEW DELHI, Jan. 16 -- "Suffering is a call to conversion; it reminds us of our frailty and vulnerability," says Pope Francis, the 87-year-old Pontiff. He finds it difficult to walk due to a severe knee problem. He had suffered a small fracture in the knee when he took a mis-step while a ligament was inflamed. In fact, Pope Francis is suffering from an arthritic process which is affecting various joints. He is a man of hope in the midst of troubles.

But look at him, he is cheerful, and busy. He does all the works and prayers without any difficulty. He walks with the help of a walking stick, and moves on a wheel chair, addresses people, meets dignitaries, blesses all who meet him. Pope Francis walks forward, teaches the world to be cheerfu...