hupsēlos

The picture behind this word is simple elevation: something that rises well above the level of whatever is around it. In the Gospels it is almost always a mountain, the towering kind a person has to be led up, and in the vision of the new Jerusalem it is a city wall so tall that its height is worth reporting. Nothing in the word itself says the thing is sacred or impressive. It only says that the thing is up there.

Greek could also use the adjective on its own, with no noun attached, as the name of a place. When Hebrews says the Son sat down "in the heights", the word for high is doing the work English does with the word "heaven": the high place is where God's majesty is. The same move stands behind the comparison in Hebrews 7:26, where the priest we have has been made higher than the heavens themselves.

One use comes straight out of the Greek Old Testament. There God brings Israel out of Egypt "with a high arm", an arm raised and ready, the way anyone raises an arm to strike or to lift. Paul's hearers in the synagogue at Antioch would have caught the phrase at once as the language of the exodus. It does not mean that God's arm is tall. It means his power was out in the open where everyone could see it.

Greek also has a noun for the height itself (ὕψος) and a verb for lifting something up (ὑψόω), and it saves the superlative (ὕψιστος) for the very top: the highest heavens, and God as the Most High.

The step from a high mountain to a high opinion of oneself is a short one, and Greek takes it with the same word. The height here is not physical but social: being up above other people, either in their eyes or in one's own.

Both sides of that show up in the New Testament. Jesus tells the Pharisees that what people rate as high is detestable in God's sight, which is a statement about reputation and about the things a crowd looks up to. Paul twice warns Christians against setting their minds on "high things", and in Romans 12 he puts that warning directly opposite keeping company with the lowly. That contrast shows what he has in view: not ambition for great projects, but the swollen self-estimate that leaves a person unwilling to sit down with people he considers beneath him.

The word is not a technical label for pride the way ὑπερήφανος is, and it never loses the picture of height. That is why the warning lands as it does. A person who thinks high things of himself has quietly moved to a place he does not belong in, and both Luke and Paul treat that place as the opposite of where faith stands.