After reiterating that the knowledge of such secrets is truly a gift of God (Gabe und Geschenck Gottes), Khunrath continues: The dear ancient philosophers obtained the knowledge and practice of this thing [the Stone and its matter], as one can clearly find in their books, either from God himself through a special divine inspiration, secret visions, or the revelations of good spirits, or from another philosopher and human teacher, or indeed from the light of nature, through diligent reading, true books, and by contemplating, meditating upon and observing wisely the wonderful workings of nature
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