Oil -- typically olive oil -- symbolizes the good that comes from celestial love. Celestial love is love of the Lord, the highest and purest love we can have. The good of celestial love is the desire to be good springing from celestial love: Wanting to do the Lord's will because you love Him. That's not a state many reach, even in heaven, but it's a beautiful goal. This representation makes sense based on the idea that the sun -- the source of all natural light and heat, and thus all natural life -- represents the Lord, the source of all spiritual light, heat and life. Burning oil was the most pure fire available in Biblical times, thus the closest representation of the sun people could create.

6844. Take off your shoes from upon your feet' means that the powers of the senses, which form the external levels of the natural, should be removed. This is clear from the meaning of 'shoes' as the powers of the senses forming the external levels of the natural, dealt with in 1748; and from the meaning of 'feet' as the natural, dealt with in 2162, 3147, 3761, 3986, 4280, 4938-4952. 'Taking off' plainly means removing since one is talking about the powers of the senses. Particular expressions have to be used in application to the actual matter to which they refer; thus 'being taken off' is applied to shoes, and 'being removed' to the powers of the senses. The implications of all this need to be stated. Anyone can see that here 'shoes' represent something that does not accord with Him who is holy and Divine, so that 'taking off one's shoes' was representative of the removal of things like that. Without this representation what would it matter to the Divine whether a person drew near in shoes or in bare feet, provided that inwardly he is the kind of person who can draw near the Divine in faith and love? Therefore the powers of the senses are meant by 'shoes', and those powers, which form the external levels of the natural, are by nature such that they cannot remain when one thinks with reverence about the Divine. Consequently because it was a time when representatives had to be observed, Moses was not allowed to draw near with his shoes on.

[2] The reason why the powers of the senses that form the external levels of the natural are by nature such that they cannot receive the Divine is that they are steeped in ideas of worldly, bodily, and also earthly things because they are the first to receive them. Therefore sensory impressions contained in the memory as a result of the activity of the senses draw their nature from the light and heat of the world, and hardly at all from the light and heat of heaven. As a consequence they are the last things that can be regenerated, that is, receive something of the light of heaven. This explains why, when a person is ruled by his senses and sensory impressions control his thinking, he inevitably thinks of the Divine as he does of earthly things. If also he is ruled by evil those impressions make him think in ways altogether contrary to the Divine. When therefore a person thinks about the kinds of things that have to do with faith and love to God he is raised, if he is governed by good, from the powers of the senses which form the external levels of the natural to more internal levels, consequently from earthly and worldly things nearer to celestial and spiritual ones.

[3] This is something people do not know about, the reason being that they do not know that internal levels distinct and separate from external ones are present within them, or that thought exists on increasingly internal levels as well as on more external ones. And unaware of these things a person cannot reflect on them. But see what has been stated already about thought ruled by sensory impressions:

People whose thought is ruled by sensory impressions have little wisdom, 5084, 5089, 5094, 6201, 6310-6312, 6314, 6316, 6318, 6598, 6612, 6614, 6622, 6624.

A person may be raised above the level of the senses, and when he is raised he comes into a quite gentle light; and this happens especially to those who are being regenerated, 6183, 6313, 6315.

All this now shows what is meant by 'taking off one's shoes from upon one's feet'. A person's natural divides into the external, the middle, and the internal, see 4570, 5118, 5126, 5497, 5649. The internal natural is meant by 'the feet', the middle natural by 'the soles', and the external by 'the shoes'.