First Reading: Exodus 19:1-9; 20:18-21
So Moses came and called the elders of the people, and set before them all these words which the Lord had commanded him. And all the people answered together and said, "All that the Lord has spoken we will do." And Moses reported the words of the people to the Lord. And the Lord said to Moses, "Lo, I am coming to you in a thick cloud, that the people may hear when I speak with you, and may also believe you for ever." Then Moses told the words of the people to the Lord…Now when all the people perceived the thunderings and the lightnings and the sound of the trumpet and the mountain smoking, the people were afraid and trembled; and they stood afar off, and said to Moses, "You speak to us, and we will hear; but let not God speak to us, lest we die." And Moses said to the people, "Do not fear; for God has come to prove you, and that the fear of him may be before your eyes, that you may not sin." And the people stood afar off, while Moses drew near to the thick darkness where God was.
Second Reading: Acts 2:1-21
When the day of Pentecost had come, they were all together in one place. And suddenly a sound came from heaven like the rush of a mighty wind, and it filled all the house where they were sitting. And there appeared to them tongues as of fire, distributed and resting on each one of them. And they were all filled with the Holy Spirit and began to speak in other tongues, as the Spirit gave them utterance. Now there were dwelling in Jerusalem Jews, devout men from every nation under heaven. And at this sound the multitude came together, and they were bewildered, because each one heard them speaking in his own language. And they were amazed and wondered, saying, "Are not all these who are speaking Galileans? And how is it that we hear, each of us in his own native language? Parthians and Medes and Elamites and residents of Mesopotamia, Judea and Cappadocia, Pontus and Asia, Phrygia and Pamphylia, Egypt and the parts of Libya belonging to Cyrene, and visitors from Rome, both Jews and proselytes, Cretans and Arabians, we hear them telling in our own tongues the mighty works of God." And all were amazed and perplexed, saying to one another, "What does this mean?"
Epistle: 1 Corinthians 12:1-27
Therefore I want you to understand that no one speaking by the Spirit of God ever says "Jesus be cursed!" and no one can say "Jesus is Lord" except by the Holy Spirit. Now there are varieties of gifts, but the same Spirit; and there are varieties of service, but the same Lord; and there are varieties of working, but it is the same God who inspires them all in every one. To each is given the manifestation of the Spirit for the common good. To one is given through the Spirit the utterance of wisdom, and to another the utterance of knowledge according to the same Spirit, to another faith by the same Spirit, to another gifts of healing by the one Spirit, to another the working of miracles, to another prophecy, to another the ability to distinguish between spirits, to another various kinds of tongues, to another the interpretation of tongues. All these are inspired by one and the same Spirit, who apportions to each one individually as he wills. For just as the body is one and has many members, and all the members of the body, though many, are one body, so it is with Christ. For by one Spirit we were all baptized into one body—Jews or Greeks, slaves or free—and all were made to drink of one Spirit. For the body does not consist of one member but of many. If the foot should say, "Because I am not a hand, I do not belong to the body," that would not make it any less a part of the body. And if the ear should say, "Because I am not an eye, I do not belong to the body," that would not make it any less a part of the body. If the whole body were an eye, where would be the hearing? If the whole body were an ear, where would be the sense of smell? But as it is, God arranged the organs in the body, each one of them, as he chose. If all were a single organ, where would the body be? As it is, there are many parts, yet one body.
The Gospel: John 14:15-17, 25-26; 15:26-16:15
"If you love me, you will keep my commandments. And I will pray the Father, and he will give you another Counselor, to be with you for ever, even the Spirit of truth, whom the world cannot receive, because it neither sees him nor knows him; you know him, for he dwells with you, and will be in you…These things I have spoken to you, while I am still with you. But the Counselor, the Holy Spirit, whom the Father will send in my name, he will teach you all things, and bring to your remembrance all that I have said to you…But when the Counselor comes, whom I shall send to you from the Father, even the Spirit of truth, who proceeds from the Father, he will bear witness to me; and you also are witnesses, because you have been with me from the beginning. I have said all this to you to keep you from falling away. They will put you out of the synagogues; indeed, the hour is coming when whoever kills you will think he is offering service to God. And they will do this because they have not known the Father, nor me. But I have said these things to you, that when their hour comes you may remember that I told you of them. I did not say these things to you from the beginning, because I was with you. But now I am going to him who sent me; yet none of you asks me, 'Where are you going?' But because I have said these things to you, sorrow has filled your hearts. Nevertheless I tell you the truth: it is to your advantage that I go away, for if I do not go away, the Counselor will not come to you; but if I go, I will send him to you. And when he comes, he will convince the world concerning sin and righteousness and judgment: concerning sin, because they do not believe in me; concerning righteousness, because I go to the Father, and you will see me no more; concerning judgment, because the ruler of this world is judged. I have yet many things to say to you, but you cannot bear them now. When the Spirit of truth comes, he will guide you into all the truth; for he will not speak on his own authority, but whatever he hears he will speak, and he will declare to you the things that are to come. He will glorify me, for he will take what is mine and declare it to you. All that the Father has is mine; therefore I said that he will take what is mine and declare it to you.”