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.

4116. 'And crossed the river' means a state in which a joining together takes place. This is clear from the meaning of 'the river', which in this case is the Euphrates, as a joining together, namely a joining to the Divine. The reason 'the river' has this meaning here is that it was the boundary separating the land of Canaan from that region, and all the boundaries of the land of Canaan were representative of and consequently meant spiritually that which came last and yet first - last because that was where it came to an end, and first because it was where it began. For all boundaries are such that they come last for those who are going out of the country but first for those who are coming in. Because Jacob was at that point coming in, that river was the first boundary that he crossed, and so means a joining together - in the highest sense a joining to the Divine; for 'the land of Canaan' in the internal sense means the Lord's heavenly kingdom, 1607, 3481, and in the highest sense the Lord's Divine Human, 3038, 3705. From all this one may see what is meant here by 'he crossed the river'. For all things in the land of Canaan were representative, with distances, positions, and boundaries determining their individual representations, see 1585, 3686; thus the rivers which served as boundaries, such as the river of Egypt, the river Euphrates, and the river Jordan, were representative, 1866.