The 23rd Psalm is one of the best-known and most-loved literary works in the world, and it may well be the best poem ever written. It is also a fine example of the power of figurative language: We read deep things into the vision of ourselves as sheep, led to green pastures and good water by a kind shepherd. It’s empowering to feel the confidence to go fearlessly into the valley of the shadow of death, and to feel the love and caring of a table prepared by the Lord and a cup so full it overflows.

What people don’t know, however, is that this language actually has precise internal meanings, and that when we see them there is an even deeper beauty in the poem. That’s because what it actually describes is the path to heaven, and the fierce desire the Lord has to lead us there.

The first step is to let the Lord be our shepherd – to accept His teaching and His leadership. The green pastures and the still waters represent the things He will teach us for the journey. Then He begins working inside is, setting our spiritual lives in order, so that we desire to do what’s good and to love one another. That’s represented by restoring our souls and leading us in the paths of righteousness.

But we will still face challenges. We still live external lives, out in the world, and we are subject to desires that arise in those externals, in our bodily lives. That’s the valley of the shadow of death. But the rod and staff represent truth from the Lord on both external and internal levels, ideas that can defend us against those desires.

And if we keep following, the Lord will prepare a table for us – a place inside us that he can fill with love (the anointing oil) and wisdom (the overflowing cup). Thus transformed, we can enter heaven, with love for others (“goodness”) and love from the Lord (“mercy”) and can love and be loved to eternity.

One of many beautiful things about this is the fact that it is the Lord who really does all the work. In the whole text, the only action taken by the sheep is walking through the valley of the shadow of death. Other than that, they follow the Lord, trust the Lord, accept the blessings of the Lord. And that is really true! In external states (in the valley) we might seem to be doing the work ourselves, but internally, spiritually, we simply need to give ourselves to the Lord and let Him bless us.

The underlying idea here is that the Lord created us so that He could love us, in loving us wants us to be happy, knows that our greatest happiness will come from being conjoined to Him in heaven, and Himself wants nothing more than to be conjoined to us. So everything He does, in every moment of every day for every person on the face of the planet, is centered on the goal of getting that person to heaven. He wants each and every one of us in heaven more than we are capable of imagining. We just need to cooperate.

(References: Apocalypse Explained 375 [34], 727 [2]; The Inner Meaning of the Prophets and Psalms 273)

Here's an extract from Swedenborg's explanation of the inner meaning of the Book of Revelation, in which he has collected a nice set of passages from the Word, about peace. It's powerful to read them as a set.

This is from Apocalypse Revealed 306:

"[In the Word,] Peace symbolizes everything whatever that comes from the Lord, and so everything pertaining to heaven and the church, and the blessings of life in them. In the highest or inmost sense, these are blessings of peace.

It follows from this that peace means charity, spiritual security, and inner rest, for when a person abides in the Lord, he is at peace with his neighbor, which is a state of charity, and he has protection from hell, which is spiritual security. And when he is at peace with his neighbor and has protection from hell, he enjoys an inner rest from evils and falsities.

Accordingly, since all these blessings come from the Lord, it can be seen what is symbolically meant by peace in general and in particular in the following passages:

...unto us a Child is born, unto us a Son is given; the government will be upon His shoulder. His name will be called... God, Hero, Everlasting Father, Prince of Peace. Of the increase of His government and peace there will be no end... (Isaiah 9:6-7)

(Jesus said,) "Peace I leave with you, My peace I give to you." (John 14:27)

(Jesus said,) "These things I have spoken to you, that in Me you may have peace." (John 16:33)

In His days the righteous shall flourish, and much peace... (Psalms 72:3, 7)

Then I will make a covenant of peace... (Ezekiel 34:25, 27; 37:25-26)

How delightful upon the mountains are the feet of him who brings good news, who proclaims peace..., who says to Zion, "Your King reigns!" (Isaiah 52:7)

Jehovah bless you and... lift up His countenance upon you, and give you peace. (Numbers 6:24-26)

Jehovah will bless His people with peace. (Psalms 29:11)

(Jehovah) will redeem my soul in peace... (Psalms 55:18)

The work of (Jehovah) is peace, [and] the labor of righteousness, rest and security forever, that (they) may dwell in a tabernacle of peace, in secure tents, and in tranquil places of rest. (Isaiah 32:17-18)

(Jesus said to the seventy that He sent out,) "Whatever house you enter, first say, 'Peace to this house.' And if a son of peace is there, your peace will rest on it." (Luke 10:5-6, cf. Matthew 10:12-14)

The wretched shall possess the earth, and shall delight themselves in an abundance of peace... ...observe the upright man, for the final state for that man is peace. (Psalms 37:11, 37)

(Zacharias, prophesying, said,) ."..the Dayspring from on high has appeared..., to guide our feet into the way of peace." (Luke 1:78-79)

Depart from evil and do good; seek peace and pursue it. (Psalms 34:14)

Much peace have those who love Your law... (Psalms 119:165)

"Oh, that you had heeded My commandments! Then your peace would have been like a river...." "There is no peace," says Jehovah, "for the impious." (Isaiah 48:18, 22)

(Jehovah) will speak peace to His people... Righteousness and peace will kiss. (Psalms 85:8, 10)

There is no peace in my bones because of my sin. (Psalms 38:3)

He has filled me with bitterness... ...moved (is) my soul far from peace; I have forgotten goodness. (Lamentations 3:15, 17)

And so on in many other places, from which it can be seen that the aforesaid blessings are meant by peace. Fix your mind on spiritual peace, and you will clearly see.

So likewise in the following places: Isaiah 26:12; 53:5; 54:10, 13; Jeremiah 33:6, 9; Haggai 2:9; Zechariah 8:16, 19; Psalms 4:6-8; 120:6-7; 122:6-9; 128:5-6; 147:14."