First Reading Jeremiah 20:7-9

7O LORD, thou hast deceived me, and I was deceived; thou art stronger than I, and thou hast prevailed. I have become a laughingstock all the day; every one mocks me. 8For whenever I speak, I cry out, I shout, "Violence and destruction!" For the word of the LORD has become for me a reproach and derision all day long. 9If I say, "I will not mention him, or speak any more in his name," there is in my heart as it were a burning fire shut up in my bones, and I am weary with holding it in, and I cannot.

Responsorial Psalm Psalms 63:2-6, 8-9

1O God, thou art my God, I seek thee, my soul thirsts for thee; my flesh faints for thee, as in a dry and weary land where no water is. 2So I have looked upon thee in the sanctuary, beholding thy power and glory. 3Because thy steadfast love is better than life, my lips will praise thee. 4So I will bless thee as long as I live; I will lift up my hands and call on thy name. 5My soul is feasted as with marrow and fat, and my mouth praises thee with joyful lips, 7for thou hast been my help, and in the shadow of thy wings I sing for joy. 8My soul clings to thee; thy right hand upholds me.

Second Reading Romans 12:1-2

1I appeal to you therefore, brethren, by the mercies of God, to present your bodies as a living sacrifice, holy and acceptable to God, which is your spiritual worship. 2Do not be conformed to this world but be transformed by the renewal of your mind, that you may prove what is the will of God, what is good and acceptable and perfect.

Gospel Matthew 16:21-27

21From that time Jesus began to show his disciples that he must go to Jerusalem and suffer many things from the elders and chief priests and scribes, and be killed, and on the third day be raised. 22And Peter took him and began to rebuke him, saying, "God forbid, Lord! This shall never happen to you." 23But he turned and said to Peter, "Get behind me, Satan! You are a hindrance to me; for you are not on the side of God, but of men." 24Then Jesus told his disciples, "If any man would come after me, let him deny himself and take up his cross and follow me. 25For whoever would save his life will lose it, and whoever loses his life for my sake will find it. 26For what will it profit a man, if he gains the whole world and forfeits his life? Or what shall a man give in return for his life? 27For the Son of man is to come with his angels in the glory of his Father, and then he will repay every man for what he has done.