885. That 'a leaf' means truth is clear from various places in the Word, where man is compared to or actually called a tree. 'Fruit' in those contexts means the good that stems from charity, and 'leaf' the truth deriving from this, for these are indeed like fruit and leaves, as in Ezekiel,

Beside the river there is rising up upon its bank, on this side and on that, every tree for food, whose leaf does not fall, nor its fruit fail, but is reborn monthly, for its waters flow out from the Sanctuary, and its fruit will be for food, and its leaf for medicine. Ezekiel 47:11; Revelation 22:1.

Here 'tree' stands for the member of the Church who has the Lord's kingdom within him, 'fruit' stands for the good that stems from love and charity, 'leaf' for truths deriving from that good which serve to instruct the human race and to regenerate it. And because truths do this the leaf is said to be 'for medicine'. In the same prophet,

Will He not pull up its roots and cut off its fruit so that it withers? And all the plucked off (leaves) from its off-shoot will wither. Ezekiel 17:9.

The subject here is the vine, which is the Church, when it has been vastated, whose good, which is 'the fruit', and its truth, which is that 'plucked off from its off-shoot', thus wither away.

[2] In Jeremiah,

Blessed is the man who trusts in Jehovah. He will be like a tree planted beside the waters. His leaf will be green, and in the year of scarcity he will not be anxious. Nor will he cease to bear fruit. Jeremiah 17:7-8.

'Green leaf' stands for the truth of faith, and so for faith itself which derives from charity. The same applies in David, Psalms 1:3. In the same prophet,

There will be no grapes on the vine, nor figs on the fig tree, and its leaf has fallen. Jeremiah 8:13.

'Grapes on the vine' stands for spiritual good, 'figs on the fig tree' for natural good, 'leaf' for truth, which has accordingly fallen. Likewise in Isaiah 34:4. Similar things were meant by 'the fig tree' that Jesus saw, which was made to wither away when He found nothing but leaves on it, Matthew 21:20; Mark 11:13-14. The Jewish Church in particular was what 'the fig tree' was used to mean on that occasion. With this Church no natural good existed any longer, only that preserved with them which was meant by 'a leaf', namely doctrine, or truth, concerning faith. A Church that has been vastated is one that knows truth but has no wish to understand it. They are like people who say they know the truth, or matters of faith, but who possess no good at all that stems from charity. They are merely 'fig leaves', and they wither away.

904. 21:15 And he who talked with me had a gold reed to measure the city, its gates, and its wall. This symbolically means that to people who possess the goodness of love, the Lord grants a faculty for understanding and knowing the nature of the Lord's New Church as regards its doctrine and its introductory truths, and as regards the Word from which they are drawn.

He who spoke with me symbolizes the Lord speaking from heaven, because it was an angel speaking, one of the seven angels who had the seven bowls mentioned in verse 9, who means the Lord speaking from heaven (no. 895). A reed symbolizes a power or ability springing from the goodness of love - a reed symbolizing power or ability (no. 485), and gold the goodness of love (nos. 211, 726). To measure means, symbolically, to learn the character of a thing, thus to understand and know it (no. 486). The city, the holy Jerusalem, symbolizes the church in respect to its doctrine (nos. 879, 880). Its gates symbolize concepts of truth and goodness from the Word's literal sense, which are truths and goods owing to the spiritual life in them (no. 899). And the wall symbolizes the Word in its literal sense from which the doctrine and concepts come (no. 898).

It is apparent from this that "he who talked with me had a gold reed to measure the city, its gates, and its wall," symbolically means that to people who possess the goodness of love, the Lord grants a faculty for understanding and knowing the nature of the Lord's New Church as regards its doctrine and its introductory truths, and as regards the Word from which they are drawn.

[2] These symbolic meanings cannot be seen at all in the literal sense, for one sees in it only that an angel speaking with John had a gold reed with which to measure the city and its gates and wall. But even so, that these words contain another meaning, a spiritual meaning, is clearly apparent from the fact that the city Jerusalem does not mean a real city, but the church. Consequently everything said about Jerusalem as a city symbolizes such things as have to do with the church, and everything having to do with the church is, in itself, spiritual.

Such a spiritual meaning is present also in what is said in chapter 11 above, where we are told the following:

I was given a reed like a measuring rod. And the angel stood by, saying, "Rise and measure the temple of God, the altar, and those who worship there." (Revelation 11:1)

A similar spiritual meaning is present, too, in everything that the angel measured with a reed in Ezekiel 40; 41; 42; 43; 44; 45; 46; 47; 48. Also in these verses in Zechariah:

I raised my eyes and looked, and behold, a man with a measuring line in his hand. So I said, "Where are you going?" And he said to me, "To measure Jerusalem, to see what its width is and what its length." (Zechariah 2:1-2)

Indeed, such a spiritual meaning is present in everything connected with the Tabernacle and in everything connected with the Temple in Jerusalem, whose measurements we are told, and also in the measurements themselves. And yet nothing of this can be seen in the literal sense.