Moses and the burning bush
3 Now Moses was tending the flock of Jethro his father-in-law, the priest of Midian, and he led the flock to the far side of the wilderness and came to Horeb, the mountain of God. 2 There the angel of the Lord appeared to him in flames of fire from within a bush. Moses saw that though the bush was on fire it did not burn up. 3 So Moses thought, ‘I will go over and see this strange sight – why the bush does not burn up.’
4 When the Lord saw that he had gone over to look, God called to him from within the bush, ‘Moses! Moses!’
And Moses said, ‘Here I am.’
5 ‘Do not come any closer,’ God said. ‘Take off your sandals, for the place where you are standing is holy ground.’
The Holy Spirit comes at Pentecost
2 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.
1 Thessalonians 5:19
19 Do not quench the Spirit.