First Reading
PHILIPPIANS 3:3-8

3For we are the true circumcision, who worship God in spirit, and glory in Christ Jesus, and put no confidence in the flesh. 4Though I myself have reason for confidence in the flesh also. If any other man thinks he has reason for confidence in the flesh, I have more: 5circumcised on the eighth day, of the people of Israel, of the tribe of Benjamin, a Hebrew born of Hebrews; as to the law a Pharisee, 6as to zeal a persecutor of the church, as to righteousness under the law blameless. 7But whatever gain I had, I counted as loss for the sake of Christ. 8Indeed I count everything as loss because of the surpassing worth of knowing Christ Jesus my Lord. For his sake I have suffered the loss of all things, and count them as refuse, in order that I may gain Christ

Responsorial Psalm
PSALMS 105:2-7

2Sing to him, sing praises to him, tell of all his wonderful works! 3Glory in his holy name; let the hearts of those who seek the LORD rejoice! 4Seek the LORD and his strength, seek his presence continually! 5Remember the wonderful works that he has done, his miracles, and the judgments he uttered, 6O offspring of Abraham his servant, sons of Jacob, his chosen ones! 7He is the LORD our God; his judgments are in all the earth.

Gospel
LUKE 15:1-10

1Now the tax collectors and sinners were all drawing near to hear him. 2And the Pharisees and the scribes murmured, saying, "This man receives sinners and eats with them." 3So he told them this parable: 4"What man of you, having a hundred sheep, if he has lost one of them, does not leave the ninety-nine in the wilderness, and go after the one which is lost, until he finds it? 5And when he has found it, he lays it on his shoulders, rejoicing. 6And when he comes home, he calls together his friends and his neighbors, saying to them, `Rejoice with me, for I have found my sheep which was lost.' 7Just so, I tell you, there will be more joy in heaven over one sinner who repents than over ninety-nine righteous persons who need no repentance. 8"Or what woman, having ten silver coins, if she loses one coin, does not light a lamp and sweep the house and seek diligently until she finds it? 9And when she has found it, she calls together her friends and neighbors, saying, `Rejoice with me, for I have found the coin which I had lost.' 10Just so, I tell you, there is joy before the angels of God over one sinner who repents."