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)

5146. 'And in the highest basket' means the inmost degree of the will. This is clear from the meaning of 'a basket' as a degree of the will, dealt with above in 5144; and from the meaning of 'the highest' as the inmost part, dealt with in 2148, 3084, 4599. The reason 'the highest' means the inmost part is that while a person is an inhabitant of space, interior things are seen by him as higher and exterior ones as lower. But when spatial ideas are laid aside, as happens in heaven and also in a person's interior thought, the idea of height and depth is also laid aside; for height and depth belong to spatial ideas. Indeed in the inner heaven not even the idea of interior things and exterior ones exists because even that idea has a spatial element attached to it. Rather, the idea in that heaven is of a state of greater or lesser perfection; for interior things exist within a greater state of perfection than exterior ones because interior things are nearer to the Divine and exterior ones more remote from Him. This is the reason why that which is highest means that which is inmost.

[2] Nevertheless no one can have a mental grasp of the relationship of what is interior to what is exterior unless he knows about degrees, regarding which see 3691, 4154, 5114, 5145. Man has no other notion of what is interior and consequently more perfect than the ever increasing purity of something the more one breaks it down. But greater purity and greater grossness can exist simultaneously in one and the same degree, owing not only to the expanding and condensing of it but also to the limitation of it and to the introduction of similar or else dissimilar elements into it. With an idea such as that regarding his interiors man cannot possibly do other than think that exterior things are attached in a continuous manner to interior ones, and so act entirely as one with them. But if a proper idea regarding degrees is formed one may grasp how interior and exterior things are distinct and separate from one another, so distinct that interior things can come into being and remain in being without exterior ones, whereas exterior things can never do so without interior ones. One may also grasp the nature of the correspondence of interior things within exterior ones, as well as the way in which the exterior things can represent interior ones. This explains why, other than hypothetically, the learned are unable to examine the question regarding the interaction of the soul and the body. Indeed it also explains why many of them believe that life belongs intrinsically to the body, and thus that when their body dies their interiors will die too since these are closely attached to the body. But in actual fact only the exterior degree dies; the interior degree survives and goes on living.