From Pope Benedict XVI Lenten Message 2013:

"Concerning the relationship between faith and works of charity, there is a passage in the Letter to the Ephesians which provides perhaps the best account of the link between the two: "For by grace you have been saved through faith; and this is not your own doing; it is the gift of God; not because of works, lest anyone should boast. For we are his workmanship, created in Christ Jesus for good works, which God prepared beforehand, that we should walk in them" (2:8-10). It can be seen here that the entire redemptive initiative comes from God, from his grace, from his forgiveness received in faith; but this initiative, far from limiting our freedom and our responsibility, is actually what makes them authentic and directs them towards works of charity. These are not primarily the result of human effort, in which to take pride, but they are born of faith and they flow from the grace that God gives in abundance. Faith without works is like a tree without fruit: the two virtues imply one another. Lent invites us, through the traditional practices of the Christian life, to nourish our faith by careful and extended listening to the word of God and by receiving the sacraments, and at the same time to grow in charity and in love for God and neighbor, not least through the specific practices of fasting, penance and almsgiving."