'High' in the Bible

Therefore, remember from what high state you have fallen and repent! Do the deeds you did at the first; if not, I will come to you and remove your lampstand from its place -- that is, if you do not repent.

Then I saw one angel standing in the sun, and he shouted in a loud voice to all the birds flying high in the sky: "Come, gather around for the great banquet of God,

It has a massive, high wall with twelve gates, with twelve angels at the gates, and the names of the twelve tribes of the nation of Israel are written on the gates.