9726. 'And you shall make for it a grating, a network' means the level of sensory perception, which is the last and lowest. This is clear from the meaning of 'a grating, a network' as external sensory perception, thus that which forms for a person the last and lowest level of life; and since this lowest level is meant by the grating it was placed all the way round the altar. Such sensory perception was represented by the grating because it first sifts so to speak and sorts out those things which enter the human mind and present themselves to the understanding and will, namely truths and forms of good. If the sensory perception is composed of good it does not let anything through other than forms of good, and truths derived from good, and rejects evils and the falsities arising from evil. For sensory perception is the actual ability to perceive things which belong to the understanding and to sense those which belong to the will as they exist on outermost levels, an ability that is perfectly fashioned for the affections for those things. The nature of all this may be illustrated by very many things in the body. Everywhere in the outermost parts within the body there are forms that resemble nets and there are so to speak gratings which sort out the things that flow towards them from the world. Those that are suitable are let through because they are desirable, and those that are unsuitable are rejected because they are loathsome. Extremely sensitive systems such as these exist in the stomach. These let through into the blood the suitable juices of the chyle, because these juices are useful and therefore desirable, and reject the unsuitable because they are harmful and therefore loathsome. The situation is similar with sensory perception, which is the last and lowest level of a person's life. But this level with a person has become totally wrecked, the reason why being that it stands right next to and is exposed to the world and is therefore the last to be regenerated, indeed scarcely anyone at the present day is able to be regenerated down to that level. As regards what the level of sensory perception is like with these people, see what has been shown already concerning it in 4009, 5077, 5081, 5084, 5094, 5125, 5128, 5580, 5767, 5774, 6183, 6201, 6310-6318, 6564, 6598, 6612, 6614, 6622, 6624, 6844, 6845, 6948, 6949, 7442, 7645, 7693, 9212, 9216.

Therefore if a person is to see and have an understanding of the truths of faith and the forms of the good of love he must be raised by the Lord above that level to more internal levels. But the sensory perception meant by 'the grating, the network' around the altar is the sensory perception belonging to the Lord's Divine Human, since the altar is representative of the Lord and of the worship of Him that springs from the good of love, 9714.

7693. 'In the whole land of Egypt' means on every side in the natural. This is clear from the meaning of 'the land of Egypt' as the natural mind, and so the natural, dealt with in 7674. Since 'the locust', which has been the subject here, means falsity in the outermost parts, that is, in the sensory level of the human mind, let me say what the sensory level is in order that people may thereby know what falsity in the outermost parts of the mind is. A sensory-minded person, or a person whose thought and actions are reduced to the sensory level, is one who does not believe anything unless it is palpable to his outward senses, and who is led solely by bodily appetites, pleasure-seeking desires, and covetous passions, and not by rational ways of thinking. Ideas that lend support to urges such as these are what he believes to be rational ways of thinking. Being like this a sensory-minded person denies the existence of everything of an internal nature, until at length he will not even allow it to be mentioned. Consequently he refuses in his heart to believe in anything whatever of heaven. He does not have any belief in life after death, because he considers life to reside solely in the body. He therefore also supposes that when he dies it will be the same for him as for an animal. That person thinks so to speak on the surface, that is, on the lowest or outermost levels, and he is totally unaware of the existence of interior thought that is dependent on the perception of what is true and good. The reason why he is not aware of this, nor even of the existence of an internal man, is that the inner parts of his mind look down towards things of the world, the body, and the earth, and make one with them. They have therefore been diverted from looking upwards or towards heaven, for they are turned in the opposite direction. Looking upwards or towards heaven does not consist in thinking about the things of heaven but in having them as one's end in view, that is, loving them above all else. For in whatever direction love turns, the inner parts of a person's mind turn, and so too his thought. All this goes to show the nature of the sensory level of a person's mind, or the natural in its outermost parts, for a person who thinks on the sensory level is called sensory-minded.