Revival is defined as improvement in the condition or strength of something

Revival in the Old Testament
Then God said to Jacob, “Go up to Bethel and settle there, and build an altar there to God, who appeared to you when you were fleeing from your brother Esau.” So Jacob said to his household and to all who were with him, “Get rid of the foreign gods you have with you, and purify yourselves and change your clothes. Then come, let us go up to Bethel, where I will build an altar to God, who answered me in the day of my distress and who has been with me wherever I have gone.” So they gave Jacob all the foreign gods they had and the rings in their ears, and Jacob buried them under the oak at Shechem. Then they set out, and the terror of God fell on the towns all around them so that no one pursued them. (Genesis 35:1-5 NIV)

Each time, although in different ways, the initiative is clearly taken by God. In this way we can recognise examples of His graciousness to a very unworthy man. This reminds us of our own unworthiness before God, and of the grace that God exercises in His dealings with us.
So Samuel said to all the Israelites, “If you are returning to the Lord with all your hearts, then rid yourselves of the foreign gods and the Ashtoreths and commit yourselves to the Lord and serve him only, and he will deliver you out of the hand of the Philistines.” (1 Samuel 7:3 NIV)

Elijah. (First Kings, chapter 18.)
The period of three and a half years of drought was a very testing period for Israel, for those Israelites who were faithful to Jehovah, and for Elijah the prophet.
It tested Israel because Baal worship was a fertility cult which was supposed to provide the means to manipulate the weather and the harvest
Elijah was tested because he had to rely upon God to supply every need, including food, water and protection. His ability to recognise the leading of God is amazing, especially when we remember how many mistakes people make today in trying to hear what God is saying to them.
The climax, however, was reached on Mount Carmel where the strangest series of events took place.
Read acts 2
Every year the Old Testament Jews had the Passover celebration. Sum up Passover Celebrating death passing them over. and then 50 days after Passover there was a festival called ziv. It was a festival for the beginning of the harvest.
Jesus died during Passover he was our Passover lamb. And then he sent his Holy Spirit 50 days after Passover on the festival of ziv. it fell on the same day. And just as harvest was soon to be harvested it symbolized for the church the beginning of gods spiritual harvest of souls in the world. No longer was it going to be isolated events like Jacob. Samuel and Elijah

1. In one place. Verse 1.
The word is homothumadon, which the King James translates with the lovely phrase “in one accord.” It’s a musical term that means to strike the same notes together. We all know what it is to listen to a choir sing and the music is lovely and lilting and then without warning, someone hits a wrong note. The discordant sound sticks out like a sore thumb. When the early church prayed, there were no “wrong notes”–no ugly attitudes, no pointing fingers, no pity parties, no gossipy stories, no secrets told behind closed doors. When people don’t like each other, they can’t pray together very long. Either you’ll stop criticizing or you’ll stop praying because you can’t do both at the same time.”

-fire alarm
-fire is coming
-get ready
-do we need to apologize

2. His presence verse 2.
Fire exodus 3:12- burning bush
Exodus 13:21 – pillar of fire
1kings 18:38-39- calling down fire
-Smith wiggles worth
-glory Invasion herzog- 4 hours away from his destination and he was scheduled to speak at an event that was supposed to happen in one hour.
-camp experience

3. Everyone understands verse 5.
-youth ministry
-pink elephant with purple polka dots
-handstand illustration

4. Boldness verse 14.
Peter denied Christ

Coffee illustration. 4,204,800 minutes
Heat up the atmosphere

3 challenges Mark 1:35
-Get up early