Most of the time, falling means a lowering in spiritual state, from one closer to the Lord to one further. But, as with other common verbs, the meaning of "fall" is highly dependent on context in regular language, and in the spiritual sense as well. People fall on their faces in prayer, fall in battle, fall on others to attack them and fall on each other's necks in greeting. Stars fall from the sky, mountains fall on people, cities fall, and even faces fall. There's a lot of falling, in very different circumstances. When people fall on their faces in prayer -- it shows humility, and an acknowledgement of their own low state and need for the Lord's help. When they fall on each other's necks, it means a communication between the two spiritual states. At the other end of the scale, it illustrates complete spiritual destruction in the fall of a city.

402. Verse 13. And the stars of heaven fell unto the earth, signifies that the knowledges of good and truth perished. This is evident from the signification of "stars" as being the knowledges of good and truth (See above, n. 72); also from the signification of "falling unto the earth," as being to perish; for when stars fall to the earth they perish. The same is signified by:

The stars shall fall from heaven (Matthew 24:29; and Mark 13:25).

Anyone can see that "stars" here do not mean stars, for these cannot fall from heaven, for they are fixed or established in their place, and cannot fall to the earth, because they are larger than the earth; consequently by them are signified such things as belong to heavenly light, and give light, which are the knowledges of good and truth. Moreover, stars appear in the angelic heaven, but they are appearances from the knowledges of good and truth, therefore they appear about those who are in such knowledges, especially when they turn them over in the mind, and are desirous of knowing them.