In general, trees represent the deepest and most significant intellectual concepts: the ones that come to us most directly from the Lord. This varies depending on us and our states: the people of the Most Ancient Church, who were in a state of loving the Lord, understood truth automatically and internally through what the Writings call "perception"; people in lower states (including most of us) have to work a little harder to learn it from the Word and by willing to follow the Lord. In other parts of the Bible, especially in the prophets and New Testament parables, the meaning of "tree" is broader, meaning not just a person's intellectual concepts but the whole person.

'Trees,' as in Joel 1:10-12, signify knowledges.

6868. 'And that I should lead the children of Israel out' means and so deliver those who belonged to the spiritual Church. This is clear from the meaning of 'leading out' as delivering, as above in 6865; and from the representation of 'the children of Israel' as those belonging to the spiritual Church, dealt with in 6637, 6862, 6865.