Catholic theology
Catholic belief holds that the church exists both on earth and in heaven simultaneously, and thus the Virgin Mary and the saints are alive and part of the living church. Prayers and devotions to Mary and the saints are common practices in Catholic life. These devotions are not worship, since only God is worshiped. The church teaches that the saints "do not cease to intercede with the Father for us. ... So by their fraternal concern is our weakness greatly helped."
Epistle to the Romans
Roman Catholics accept the necessity of faith for salvation but point to for the necessity of living a virtuous life as well:
But by your hard and impenitent heart you are storing up wrath for yourself on the day of wrath when God's righteous judgment will be revealed. For he will render to every man according to his works: to those who by patience in well-doing seek for glory and honor and immortality, he will give eternal life; but for those who are factious and do not obey the truth, but obey wickedness, there will be wrath and fury. There will be tribulation and distress for every human being who does evil, the Jew first and also the Greek, but glory and honor and peace for every one who does good, the Jew first and also the Greek. For God shows no partiality.
Throughout his writings, St. Augustine strongly affirms the Catholic understanding of this and other such Scriptural admonitions. In his sermons to his Catholic congregations, he is especially careful to warn them against an inordinate desire for a complete assurance of salvation. In his "Exposition of Psalm 147" for example, he states: