863. 'Noah opened the window of the ark which he had made means a further state when the truths of faith appeared to him. This becomes clear from the final words of the previous verse, which state that 'the tops of the mountains appeared'. It becomes clear from the meaning of those words, and also from the meaning of 'a window', dealt with already in 655, as that which constitutes the understanding part of the mind, or what consequently amounts to the same, the truth of faith. It becomes clear too from the fact that this is the first glimmer of light. The same observation made already about that which constitutes the understanding part, namely the truth of faith, being meant by 'a window must be made here. It is this: No truth of faith can possibly exist unless it originates in good stemming from love or charity, just as nothing that truly constitutes the understanding exists unless it comes from the will. Take away the will and no understanding exists, as shown several times already. Take away charity therefore and no faith exists. But because man's will is nothing else than evil desire the Lord has miraculously taken steps to prevent that which constitutes the understanding part, which is the truth of faith, being immersed in his evil desire, and has separated the understanding part of man's mind from the will part by means of a certain go-between, namely conscience, to which charity is added by the Lord. Without this miraculous provision nobody could ever have been saved.

'Grass' is natural truth, and 'flower of the field' is spiritual truth, as in Isaiah 40:5, 6. Green grass, in the Word, signifies the good and truth of the church, and of faith, which first springs up in the natural man. This is also signified by 'herb in the field.' Grass and the pulse of the herb, as in Psalm 32:2, signify what is most vile. Grass signifies science from a spiritual origin, or that by which spiritual truth is confirmed. 'Reeds and rushes' signify science from a sensory origin, or the things which confirm the fallacies of the senses, as in Isaiah 25:7. This science, considered in itself, is only a part of the lowest natural degree, which may be justly called material and bodily, in which there is little or no life. Green grass also signifies that which is alive with man. 'Grass burnt up' signifies the things which are dead in him. Grass signifies the scientific principle. Just as green grass serves animals for support, spiritual truth serves men for spiritual nourishment.

(Verweise: Apocalypse Explained 507)