'Happen' in the Bible

This is the revelation of Jesus the Messiah, which God gave him to show his servants the things that must happen soon. He made it known by sending his messenger to his servant John,

Therefore, write down what you have seen, what is, and what is going to happen after this.

After these things, I saw a door standing open in heaven. The first voice that I had heard speaking to me like a trumpet said, "Come up here, and I will show you what must happen after this."

the light of a lampwill never shine in you again;and the voice of a groom and bridewill never be heard in you again.All this will happenbecause your merchantswere the nobility of the earth,because all the nations were deceivedby your sorcery,

He told me, "These words are trustworthy and true. The Lord God of the spirits and of the prophets has sent his messenger to show his servants the things that must happen soon."