The second qualification is contemplation, by which, says Basil, “I understand an accurate attention to the business itself, under which will fall these considerations first to be noted. As, what are the circumstances of anything; what the matter; what the form; whence its operations proceed; whence it is infused and implanted; how generated ... also how the body of everything may be ... resolved into its first matter or essence. This contemplation is celestial, and to be understood with spiritual reason; for the circumstances and depths of things cannot be conceived in any other way than by the spiritual cogitation of man: and this contemplation is two-fold. One is called possible, the other impossible. The latter consists in copious cogitations which never proceed to effects, nor exhibit any form of matter which falls under the touch, as if any should endeavour to comprehend the Eternity of the Most High, which is vain and impossible; yea, it is a sin against the Holy Ghost, so arrogantly to pry into the Divinity itself, which is immense, infinite, and eternal; and to subject the incomprehensible counsel of the secrets of God to human inquisition. The other part of contemplation which is possible is called theory. This contemplates that which is perceived by touch and sight, and hath a nature formed in time; this considers how that nature may be helped and perfected by resolution of itself; how every body may give forth from itself the good or evil, venom or medicine, latent in it; how destruction and confection are to be handled, whereby, under a right proceeding, without sophistical deceits, the pure may be severed and separated from the impure. This separation is made and instituted by divers manual operations ... some of which are vulgarly known by experience, others remote from vulgar experience. These are calcination, sublimation, reverberation, circulation, putrefaction, digestion, distillation, cohobation, fixation, and the like of these; all the degrees of which are found in operating, learned, and perceived, and manifested by the same. Whence will clearly appear what is movable, what is fixed, what is white, what red, black, blue, green, namely, when the operation is rightly instituted by the artificer; for possibly the operation may err, and turn aside from the right way; but that Nature should err, when rightly handled, is not possible. Therefore if you shall err, so that nature cannot be altogether free, and released from the body in which it is held captive, return again unto your way; learn the theory more perfectly, and inquire more practically into the method of your operating, that you may discover the foundation and certainty in the separation of all things; which is a matter of great concern. And this is the second foundation of philosophy which follows prayer; for in that the sum of the matter lies, and is contained in these words:--Seek first the kingdom of God and his righteousness by prayer, and all other things