God cares about every detail of the spreading of the Gospel.

Jesus told them wait, their hearts told them to pray and praise!

The Holy Spirit was present in the OT, but he acted upon certain individuals or small groups of people to help them accomplish his plan. (Moses) Exodus 31:3, (Samson) Judges 14:6, Samuel choosing David as king 1 Sam 16.

Jesus promised to send his Spirit
Luke 24:49, John 14:16-17.

John 20
19 On the evening of that first day of the week, when the disciples were together, with the doors locked for fear of the Jewish leaders, Jesus came and stood among them and said, “Peace be with you!” 
20 After he said this, he showed them his hands and side. The disciples were overjoyed when they saw the Lord.
21 Again Jesus said, “Peace be with you! As the Father has sent me, I am sending you.” 
22 And with that he breathed on them and said, “Receive the Holy Spirit. 
23 If you forgive anyone’s sins, their sins are forgiven; if you do not forgive them, they are not forgiven.”
24 Now Thomas (also known as Didymus), one of the Twelve, was not with the disciples when Jesus came. 
25 So the other disciples told him, “We have seen the Lord!”
But he said to them, “Unless I see the nail marks in his hands and put my finger where the nails were, and put my hand into his side, I will not believe.”
26 A week later his disciples were in the house again, and Thomas was with them. Though the doors were locked, Jesus came and stood among them and said, “Peace be with you!” 
27 Then he said to Thomas, “Put your finger here; see my hands. Reach out your hand and put it into my side. Stop doubting and believe.”
28 Thomas said to him, “My Lord and my God!”
29 Then Jesus told him, “Because you have seen me, you have believed; blessed are those who have not seen and yet have believed.”

Acts 1
8 But you will receive power when the Holy Spirit comes on you; and you will be my witnesses in Jerusalem, and in all Judea and Samaria, and to the ends of the earth.”

This is the last statement of Christ on earth.

When Jesus ascended into heaven his physical presence left, but he promised to send his spirit to be among us and actually be in us!

Look at the apostles and the followers of Jesus before the Spirit was given.

Luke 24
45 Then he opened their minds so they could understand the Scriptures. 
46 He told them, “This is what is written: The Messiah will suffer and rise from the dead on the third day, 
47 and repentance for the forgiveness of sins will be preached in his name to all nations, beginning at Jerusalem. 
48 You are witnesses of these things. 
49 I am going to send you what my Father has promised; but stay in the city until you have been clothed with power from on high.”

2 Timothy 1
6 For this reason I remind you to fan into flame the gift of God, which is in you through the laying on of my hands, 
7 for God gave us a spirit not of fear but of power and love and self-control.

Fear is a spiritual battle!

God never told us to walk in fear, but in power!

Acts 2
1 When the day of Pentecost came, they were all together in one place. 
2 Suddenly a sound like the blowing of a violent wind came from heaven and filled the whole house where they were sitting. 
3 They saw what seemed to be tongues of fire that separated and came to rest on each of them. 
4 All of them were filled with the Holy Spirit and began to speak in other tongues as the Spirit enabled them.
5 Now there were staying in Jerusalem God-fearing Jews from every nation under heaven. 
6 When they heard this sound, a crowd came together in bewilderment, because each one heard their own language being spoken. 
7 Utterly amazed, they asked: “Aren’t all these who are speaking Galileans? 
8 Then how is it that each of us hears them in our native language? 
9 Parthians, Medes and Elamites; residents of Mesopotamia, Judea and Cappadocia, Pontus and Asia, 
10 Phrygia and Pamphylia, Egypt and the parts of Libya near Cyrene; visitors from Rome 
11 (both Jews and converts to Judaism); Cretans and Arabs—we hear them declaring the wonders of God in our own tongues!” 
12 Amazed and perplexed, they asked one another, “What does this mean?”

Pentecost means 50.

Pentecost is a festival (festival of weeks) 50 days after Passover. Festival to thank God for the harvested crops. Jesus was crucified at Passover time and ascended 40 days after Passover. Jews of many nations gathered in Jerusalem to celebrate.

How awesome is it that God chose to pick the event when many nations were represented to send the fullness of his Spirit. Acts 1:8

Pentecost is the day when God makes good on his promise to send us a helper, and comforter.

John 14
15 “If you love me, keep my commands. 
16 And I will ask the Father, and he will give you another advocate to help you and be with you forever— 
17 the Spirit of truth. The world cannot accept him, because it neither sees him nor knows him. But you know him, for he lives with you and will be in you. 
18 I will not leave you as orphans; I will come to you. 
19 Before long, the world will not see me anymore, but you will see me. Because I live, you also will live.
 20 On that day you will realize that I am in my Father, and you are in me, and I am in you. 
 21 Whoever has my commands and keeps them is the one who loves me. The one who loves me will be loved by my Father, and I too will love them and show myself to them.”

The 120 that had the conviction to wait and they would literally turn the world upside down!

I truly believe that being baptized with the Holy Spirit is the thing that can propel you to walk in the power God destined you for.