(10) Which is a Similitude of that which is in the Original of the Generating of Nature: Yet it must be set down more intelligibly [and plainly.] Mark what Mercurius is, it is Harshness, Bitterness, Fire, and Brimstone- water, the most horrible P Essence; yet you must understand hereby no Materia, Matter, or comprehensible Thing; but all no other than Spirit, and the Source of the original Nature. Harshness is the first Essence, which attracts itself; but it being a hard cold Virtue or Power, the Spirit is altogether prickly [stinging] and sharp. Now the Sting and Sharpness cannot endure attracting, but moves and resists [or opposes] and is a contrary Will, an Enemy to the Harshness, and from that Stirring comes the first Mobility, which is the third Form. Thus the Harshness continually attracts harder and harder, and so it becomes hard and tart, [strong or fierce,] so that the Virtue or Power is as hard as the hardest Stone, which the Bitterness [that is, the Harshness's own Sting or Prickle] cannot endure; and then there is great Anguish in it, like the horrible brimstone Spirit, and the Sting of the Bitterness, which rubs itself so hard, that in the Anguish there comes to be a twinkling Flash, which flies up terribly, and breaks the Harshness: But it finding no Rest, and being so continually generated from beneath, it is as a turning Wheel, which turns anxiously and terribly with the twinkling Flash furiously, and so the Flash is changed into a pricking [stinging] Fire, which yet is no burning Fire, but like the Fire in a Stone. 1 1. But seeing there is no Rest there, and that the turning Wheel runs as fast as a swift Thought, for the Prickle drives it so fast, the Prickle kindles itself so much, that the Flash (which is generated between the Astringency and Bitterness) becomes horribly fiery, and flies up like a horrible Fire, from whence the whole Materia or Matter is terrified, and falls back as dead, or overcome, and does not attract so strongly to itself any more, but each yields itself to go out one from another, and so it becomes thin. For the Fire-flash is now predominant, and the Materia, or Matter, which was so very harsh [astringent or attracting] in the Originality, is now feeble, and as it were dead, and the Fire-flash henceforth gets Strength therein, for it is its Mother; and the Bitterness goes forth up in the Flash together with the Harshness, and kindles the Flash, for it is the Father of the Flash, or Fire, and the turning Wheel henceforth stands in the Fire-flash, and the Harshness remains overcome and feeble, which is now the Water-spirit; and the Materia, or Matter of the Harshness, henceforth is like the Brimstone- spirit, very thin, raw, aching, vanquished, and the Sting in it is trembling; and it dries and sharpens itself in the Flash; and being so very dry in the Flash, it becomes continually more horrible and fiery, whereby the Harshness or Astringency is still more overcome, and the Water- spirit continually greater. And so it continually refreshes itself in the Waterspirit, and continually brings more Matter to the Fire-flash, whereby it is the more kindled; for (in a Similitude) that is the ufuel of the Flash or Fire-spirit.