Since biblical times, fasting and abstinence have been considered appropriate expressions of repentance for sin. As Catholics, we fast on Ash Wednesday and Good Friday, and we abstain from meat on Ash Wednesday and on all the Fridays of Lent. Fasting and abstaining from meat reminds us of our reliance on God, who is the source of all abundance and nourishment. As Catholics, we are encouraged to fast voluntarily and occasionally throughout the year in order to practice self-denial, to lead a life of moderation that deepens our compassion for people who are in need, and to develop a deeper hunger and thirst for God.