then it laboureth to dissolue and subtiliate by his heate and moysture, which is his soule, and striueth to enclose and retaine with his body that is colde and drie. And in this maner, is his office changed and altered from one thing to another. Thus haue I tolde thee the truth, which I haue both seene & done, giuing thee in charge to conuert natures from their subtilitie and substances, with heate and moysture, into their substances and colours. Now if thou wouldst proceed aright in this mastery, to obtaine thy desire, passe not the boundes that I haue set thee in this booke. CHAP. VI. _The manner how to fixe the Spirit._ Knowe also, that when the bodie is mingled with moysture, and that the heate of the fire meeteth therewith, the moysture is conuerted on the body, and dissolueth it, and then the spirite cannot issue forth, because it is imbibed with the fire. The Spirits are fugitiue, so long as the bodies are mingled with them, and striue to resist the fire & his flame: and yet these parts can hardly agree without a good operation and continuall labour: for the nature of the soule is to ascend vpward, whereas the center of the soule is. And who is hee that is able to ioyne two or diuers things togither, where their centers are diuers: vnlesse it be after the conuersion of theyr natures, and change of the substance and thing, from his nature, which is difficult to finde out? Whosoeuer therefore can conuert the soule into the bodie, the bodie into the soule, and therewith mingle the subtile spirites, shall be able to tinct any body. CHAP. VII. _Of the Decoction, Contrition, and washing of the stone._ Thou art moreouer to vnderstand, that Decoction, contrition, cribatiõ, mundification, and ablution, with sweet waters is very necessary to this secret and mastery: so that he who will bestow any paines herein, must cleanse it very well, and wash the blacknesse from it, and darknes that appeareth in his operation, and subtiliate the bodie as much as hee can, and afterwarde mingle therwith the soules dissolued, and spirits cleansed, so long as he thinke good. CHAP. VIII. _Of the quantitie of the Fire, and of the commoditie and discommoditie of it._