295. The celestial sense of this commandment is that the Lord Jehovah is infinite, measureless and eternal; He is omnipotent, omniscient and omnipresent. He is the first and the last, the beginning and the end, who was and who is and who shall be. He is love itself and wisdom itself, or good itself and truth itself, and consequently life itself. Thus He is the sole source of everything.

The 'Harvest,' as mentioned in Mark 4:29, signifies the increase of the church in general and particular.

In Joel 3:13, it signifies the last state of the church before it has been devastated from all good and truth.

'A harvest' symbolizes the state of the church with respect to Divine truth. The reason is that a harvest yields the grain used to make bread, and grain and bread symbolize the church's goodness, which is achieved through truths.

(Odkazy: Apocalypse Revealed 645; Joel 3; Mark 4)