BaMidbar 4:7

Verse 7. Also it is the function of celestial love and its truths to protect spiritual good derived from celestial good in the middle heaven, by means of exterior celestial truths, so that the knowledges of interior and exterior celestial good and truth in the natural man, may be conjoined with celestial good pre-eminently, and also with spiritual good pre-eminently, and with both continually.