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.

375. 'A voice crying out' and 'the voice of a cry' are expressions commonly used in the Word and are applied to any situation involving any kind of uproar, commotion, or disturbance, even when the occasion is a happy one, as in Exodus 32:17-18; Zephaniah 1:9-10; Isaiah 65:19; Jeremiah 48:3. In this instance the voice is one of accusation.