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.

770. 'Noah's wife' means the Church itself, and 'the three wives of his sons with them' the derivative Churches themselves. This is clear from what has been stated, that is to say, when the member of the Church is mentioned by name, the all of the Church is meant, or as it is called, the head of the Church. 'Wife' in that case is the Church, as shown already in 252, 253. It is different when 'man and wife' or 'male and female' are mentioned in the Word. In that case 'man' and 'male' mean things of the understanding, which are the truths of faith, while 'wife' and 'female' mean things of the will, which are the goods of faith.