Before becoming Pope, St. Leo IX was known as Bruno. He was bitten by a poisonous reptile when a boy, but St. Benedict appeared to Bruno and cured him. In 1026, Bruno, then a deacon, commanded troops in Italy under the Emperor. The Bishop of Toul died during this time, and upon Bruno's return, he was made Bishop of Toul, where he remained for twenty years. After the death of Pope Damasus II in 1048, Bruno was elected to succeed him. As Pope, he denounced simony and began many needed reforms, traveling extensively to ensure their enforcement. For this reason he was given the title Peregrinus Apostolicus, Apostolic Pilgrim. St. Leo condemned the doctrines of Berengarius, who denied Transubstantiation. He increased the papal territory, though he was criticized by St. Peter Damian when he went to battle to defend it. He opposed the Patriarch of Constantinople, Michael Cerularius; this began the complete separation of Rome from the Eastern Church. Within 40 days of St. Leo's death, there were 70 cures through his intercession. 
The Jews understood that God gave a certain portion of his Spirit to his prophets. When Elijah was about to depart for heaven, his servant Elisha asked for a double portion of the Spirit (2 Kings 2:9). Jesus tells his disciples that they can believe the words he speaks because God the Father has poured his Spirit on him in full measure, without keeping anything back. The function of the Holy Spirit is to reveal God’s truth to us. When we receive the Holy Spirit he enables us to recognize and understand God’s truth. Jesus is the Word of God and he gives us his Holy Spirit so that we can recognize his truth and live according to it. God’s truth has consequences and he gives us the freedom to choose how we will respond. The choice he gives us has eternal consequences — everlasting life or everlasting death. God challenged his people in the Old Covenant: See I have set before you this day life and good, death and evil. …I call heaven and earth to witness against you this day, that I have set before you life and death, blessing and curse; therefore choose life, that you may live, loving the Lord your God, obeying his voice, and cleaving to him” (Deuteronomy 30:15-20).
And he issues the same challenge to the people of the New Covenant today. Do you weigh the consequences of your choices? Do they lead you towards life or towards death? If you choose to obey God’s voice and to do his will, then you will know and experience that life which comes from God himself. If you choose to follow your own way apart from God and his will, then you choose for death — a spiritual death which poisons and then kills the soul until there is nothing left but an empty person devoid of love, truth, goodness, purity, peace, and joy. Do your choices lead you towards God or away from God?