The teachings of Pope John Paul II are contained in a number of documents. It has been said that these teachings will have a long-lasting influence on the Church. Pope John Paul II's philosophical and theological teachings and writings were characterised by explorations in phenomenology and personalism. He was influenced by Hans Urs von Balthasar, Henri de Lubac, Yves Congar, Karl Rahner, his predecessors as Archbishop of Kraków Eugeniusz Baziak and Adam Stefan Sapieha, and his predecessors as Pope - John XXIII, Paul VI, and John Paul I. His closest theological adviser was Cardinal Ratzinger, who succeeded him as Pope. Stanislaw Dziwisz was his personal secretary for forty years and one of his closest friends and advisers, and became Archbishop of Kraków, John Paul's former post, and Cardi