"Among the invocations dear to him was one that comes from the "Litanie di Gesù Cristo Sacerdote e Vittima" that he chose to place at the end of his book, Gift and Mystery, published on the occasion of the 50th anniversary of his ordination to the Priesthood. (cf. pp. 113-116): "Iesu, Pontifex qui tradidisti temetipsum Deo oblationem et hostiam - Jesus, High Priest who gave yourself to God as offering and victim, have mercy on us".
"How frequently did he repeat this invocation! It expresses clearly the profoundly priestly character of his whole life. He never made a mystery of his desire to become increasingly one with Christ the Priest through the Eucharistic Sacrifice, a source of tireless apostolic dedication."
(Benedict XVI, Homily, Mass in Anniversary of Pope John Paul II's Death, 3 April 2006)