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.

6201. This was how my thought was seen by spirits when I had been raised a little way above the level of the senses. But when my thought took place on the latter level no such wave-like motion was seen; instead something entirely material appeared there, not unlike an object seen with the physical eyes. This is called thinking on the sensory level; but when thought takes place on a more internal level it is referred to as being raised above the level of the senses. The ancients were well acquainted with the idea that a person can be raised above the sensory level, and therefore some of them also wrote about that condition. People whose thought takes place on the lower level are called sensory-minded, and spirits of a similar nature are attached to them. These spirits take hold of little more from a person than what enters his own awareness too; for they are more unrefined than all other spirits. I have also noticed that when a person is on the sensory level and has not been raised above it his thought is confined to what is of a bodily and worldly nature. He has no wish to know about things that belong to eternal life; indeed he refuses to listen to anything about it.

[2] To enable me to know the nature of all this I have been brought down frequently to that sensory level, when the things described have occurred instantly. At the same time spirits in that more unrefined sphere have poured in foul and offensive ideas. But as soon as I was raised above the sensory level such ideas were dispelled. The life of the majority of people who surrender themselves to physical pleasures is on that sensory level, and so is the life of those who have utterly refused to contemplate the existence of anything beyond what they can see and hear, in particular those who have refused to think about eternal life. For that reason people of this kind revile such higher things and are nauseated when they hear them mentioned. At the present day large numbers of spirits like this exist in the next life, for bands of them enter it from the world. Also when they flow into a person they prompt him to indulge his natural inclination to lead a selfish and worldly life, not a life for others except insofar as they countenance him and his selfish desires. To be raised up above these spirits a person must entertain thoughts of eternal life.