Sacerdotii Nostri Primordia §38

³⁸ But listen to his own words; for he seemed to have an inexhaustible supply of them whenever he talked about the happiness or the advantages that he found in prayer: "We are beggars who must ask God for everything"; (49) "How many people we can call back to God by our prayers!" (50) And he used to say over and over again: "Ardent prayer addressed to God: this is man's greatest happiness on earth!'' (5l)