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.

1531. To confirm for me the fact that the Lord appears to celestial angels as the Sun and to spiritual angels as the Moon, my interior sight was in the Lord's Divine mercy opened to the point where I saw plainly a shining Moon surrounded by a number of smaller moons. Their light amounted almost to that of the sun, in accordance with the words in Isaiah,

The light of the moon will be as the light of the sun. Isaiah 30:26.

But I was not allowed to behold the Sun. The Moon appeared in front of me to the right.