It is common in the Bible for people to "rise up," and it would be easy to pass over the phrase as simply describing a physical action. But in fact it represents an elevation in spiritual state, moving to a more internal frame of mind closer to the Lord. Often it has to do with understanding a new or important idea; we "rise up" to a state of greater perception and enlightenment. Obviously context is crucial to the exact meaning of the phrase in a given passage -- it matters greatly who it is that is rising up, and why.

1260. Since 'nations' in the Most Ancient Church and in the Ancient Church meant goods or good persons, therefore also in the contrary sense they mean evils or evil persons Similarly with 'peoples'; since these meant truths, therefore also in the contrary sense they mean falsities. For in a corrupted Church good is turned into evil, and truth into falsity, as a consequence of which the meaning of nations and peoples in that contrary sense occurs many times in the Word, as in Isaiah 13:4; 14:6; 18:2, 7; 30:28; 34:1-2; Ezekiel 20:13; and in many other places.