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.

16. Verse 1. In the beginning God created heaven and earth. The most ancient times of all are called 'the beginning', and are throughout the Prophets referred to as 'days of antiquity' and also 'days of eternity'. 'The beginning' also embodies within it that first Period when a person is being regenerated, for at that time he is being born anew and receiving life. Regeneration itself is therefore called a new creation of man. Almost everywhere in the prophetical sections 'to create', 'to form', and 'to make' mean to regenerate, though each of these verbs has a different shade of meaning, as in Isaiah,

Every one who is called by My name - I have created him for My glory, I have formed him, I have also made him. Isaiah 43:7

This is why the Lord is called Redeemer, One who forms from the womb, Maker, and also Creator, as in the same prophet,

I am Jehovah, your Holy One, the Creator of Israel, your King. Isaiah 43:15.

In David,

A people to be created will praise Jah. Psalms 102:18.

In the same author,

You send forth Your Spirit; they are created; and You renewest the face ¹ of the ground. Psalms 104:30.

'Heaven' means the internal man, and 'earth' the external man prior to regeneration. This will be seen further on.

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