1457. But it should be noted that wherever they may be in the universe, they still work in this way, as inner sensation. Neither place nor distance makes any difference. The driving force is a striving, and that effort pours into all who are mediums of those sensations. But because the inner sensation of the inhabitants of our earth only works downwards and mingles with earthly and bodily elements, and does not separate from them so as to be able to be lifted upwards and operate apart from them, therefore those spirits cannot stay here. This is the reason for their wandering through the universe, and they are not allowed to work as though present, except with those who are going to speak with spirits and can therefore keep aloof from the working of the mental imagery of the bodily senses.