19. I will mention some strange things, which yet are not strange in heaven; they are as follow: (1) That the natural world could not exist except from the spiritual world; consequently, it could not subsist, inasmuch as subsistence is perpetual existence. (2) That the church cannot exist in man, unless its internal be spiritual and its external natural. A church purely spiritual does not exist, nor a church merely natural. (3) Consequently, that there cannot be raised up any church, nor anything of the church with man, without an angelic heaven, through which everything spiritual is derived and descends from the Lord. (4) Since therefore the spiritual and the natural thus make one, it follows that the one cannot exist and subsist without the other; the angelic heaven not without the church with man, nor the church with him without the angelic heaven; for, unless the spiritual flow into and terminate in the natural, and rest therein, it is like a prior without a posterior, thus like an efficient cause without an effect, and like an active without a passive, which would be like a bird perpetually flying in the air without any resting place on the earth. It is also like the mind of a man perpetually thinking and willing, without any organ of sense and motion in the body, to which it may descend and produce the ideas of its thought and bring into operation the efforts of its will. (5) These things are adduced, to the end that it may be perceived or known, that as the natural world cannot exist without the spiritual world, nor conversely the spiritual world without the natural world, so neither can there be a church on the earth unless there be an angelic heaven through which it may exist and subsist, nor conversely an angelic heaven unless there be a church on the earth. (6) The angels know this; on which account, they bitterly lament when the church on earth is desolated by falsities and consummated by evils; and then they compare the state of their life with drowsiness; for then heaven is to them as a seat withdrawn, and like a body deprived of feet; but when the church on the earth has been restored by the Lord, they compare the state of their life to wakefulness.