I had forgotten this Mother Teresa/Reagan story, comes from Dinesh D’Souza:
It also infused Reagan with a sense of mortality and mission. He was convinced when he returned from the hospital that he had a limited amount of time to achieve his ambitious agenda. Yet his goals were not only political but also personal. With Cardinal Cooke, who came to visit him, Reagan struck a spiritual note: “I have decided that whatever time I have left is for Him.” The late Mother Teresa, who visited the White House that June, told Reagan, “You have suffered the passion of the cross and have received grace. There is a purpose to this. Because of your suffering and pain you will now understand the suffering and pain of the world. This has happened to you at this time because your country and the world needs you.” Reagan was speechless. Nancy Reagan wept.