Psalm 23 is undoubtedly the most well-known and well-loved of all the psalms, with its illustration of the Lord as our shepherd. The shepherd's care for his sheep is, internally, describing the things that the Lord does for us in our spiritual journey.

As the psalm unfolds we hear about the Lord’s work for us, during states in our lives when we could be unsure and afraid, and of the Lord’s provision for us. Gradually the psalmist confirms his trust in the Lord’s guidance and declares the many blessings the Lord brings.

This psalm of six verses would surely have been known and loved by the Lord during his life in the world. It would have, for him, been a statement of faith in his purpose to overcome evil and glorify his humanity. Jesus, in states where his human heredity was strong in his mind, would have regarded his own divinity as his shepherd, and seen it as his anchor and provider. For us, spiritually, the same parallel applies -- that our faith in the Lord is to be our trust and guide at all times.

The shepherding care in verses 2 and 3 speaks about how the Lord leads us into acquiring new truths that bring heavenly peace and rest for us. Our state is lifted up and we live in goodness because we understand that this is the divine quality that God wishes for us to live by. (See Apocalypse Explained 375 and Arcana Caelestia 3696)

The valley of the shadow of death describes our states of being afraid, and of not seeing the Lord with us, during which our mind can be filled with disturbing and mocking thoughts. But we know that the Lord is there with us nonetheless. The “rod” and “staff” represent the power of the Lord’s truths for us to use; a rod - used actively to guard the sheep - stands for spiritual truths, and a staff is leaned on, representing natural truths or truths to do with life.”

(Apocalypse Explained 727)

With the provision of truth from the Lord, the psalm shifts to the picture of the bounteous table which truth brings to us as our spiritual nourishment and satisfaction. Our head anointed with oil has many associations of being the Lord’s chosen, of being loved and blessed by the Lord, and of how our mind with its understanding receives love and good to make it full of heavenly joy. “My cup runs over” means the unknown extent of the truths of the Word and the blessings of the Lord. (Apocalypse Explained 727)

The final verse is put in terms of our full conviction of being in the Lord for ever and in all the days of our lives. What we experience and say in terms of time and duration spiritually means what is certain, perpetual and to all eternity. The ‘house of the Lord’ is heaven. (Arcana Caelestia 650)

9216. 'In which he may sleep' means resting on them. This is clear from the meaning of 'sleeping' as resting, in this instance on the external and sensory level, meant by 'clothing', 9212; for it says that it is clothing 'in which he may sleep'. How the explanation that more internal things find rest on the sensory level should be understood must be stated. The sensory level is the last and lowest of a person's life, as has been shown above. What is lowest contains all the more internal levels and is general to them all; for they terminate in it and accordingly rest on it. It is like the skin, for example, which is the outermost covering of the body. The body and all things in it terminate in the skin, because it contains them and they accordingly rest on the skin. In a similar way it is like the peritoneum within the body. Because it contains the abdominal organs, these rest on it and are also linked to it all round. Or equally it is like the pleura's relationship to the organs in the chest.

[2] A similar situation exists with all the things that compose a person's actual life, with those for instance that are connected with his understanding and those that are connected with his will. These too follow one another in order from more internal things to relatively external ones. The relatively external ones are factual knowledge together with its delights, while the outermost things are those of the senses, which are in contact with the world through sight, hearing, taste, smell, and touch. The more internal things rest on them since they terminate in them. These are the matters that are meant in the spiritual sense by 'the covering' or 'the clothing in which he may sleep'. The reason why things on the level of the senses are meant by 'the clothing' or 'the covering' lies in correspondences; for as stated above in 9212, spirits and angels appear dressed in garments in keeping with their truths of faith. Those governed by truths springing from good appear in shining ones, as for instance those at the Lord's tomb did, Luke 24:4; Matthew 28:3, and also in ones of fine, white linen, as for instance those referred to in Revelation 19:14 did; and others appear in garments of various colours.

[3] Furthermore it should be realized that all things without exception proceed in successive stages from their first or inmost level to their terminations on the last and lowest and rest on them. Each thing at a prior or more internal stage in order has its own connection with terminations on the lowest level. Therefore if things on the lowest level are dispelled those on interior levels are also scattered. This also explains why there are three heavens. The inmost or third heaven flows into the middle or second heaven; the middle or second heaven flows into the first or lowest heaven, which in turn flows into and resides with mankind. Consequently the human race constitutes the lowest level of order; in it heaven terminates and on it heaven rests. This being so, the Lord in His Divine [Love and Care] always provides for the presence among the human race of a Church in which truth revealed by God exists; such truth on our planet is the Word. By means of this a continuous link exists between the human race and the heavens. This is why every detail of the Word has within it an internal sense which exists for heaven's benefit and whose nature is such that it joins angels' minds to those of people on earth in so firm a bond that they act as one. All this goes to show yet again the nature of a situation in which interior things rest on those at the lowest level.