For I was not only carefull to direct all my thoughts in generall according to its rules, but I from time to time reserv'd some houres, which I particularly employd to practice it in difficulties belonging to the Mathematicks, loosening from all the principles of other Sciences, which I found not stable enough, as you may see I have done in divers explain'd in my other following discourses. And thus not living in appearance otherwise then those who having no other business then to lead a sweet and innocent life, study to separate pleasures from vices, and use honest recreations to enjoy their ease without wearinesse; I did not forbear to pursue my design, and advance in the knowledg of truth, perhaps more, then if I had done nothing but read books or frequent learned men.
Yet these nine years were vanished, before I had engaged my self in those difficulties which use to be disputed amongst the learned; or begun to seek the grounds of any more certain Philosophy then the Vulgar: And the example of divers excellent Men who formerly having had the same designe, seem'd not to me to have succeeded therein, made me imagine so much difficulty, that I had not perhaps dar'd so quickly to have undertaken it, had I not perceiv'd that some already had given it out that I had already accomplished it. I know not whereupon they grounded this opinion, and if I have contributed any thing thereto by my discourse, it must have been by confessing more ingeniously what I was ignorant of, then those are wont to do who have a little studyed, and perhaps also by comunicating those reasons, I had to doubt of many things which others esteem'd most eminent, rather then that I bragg'd of any learning. But having integrity enough, not to desire to be taken for what I was not, I thought that I ought to endeavour by all means to render my self worthy of the reputation which was given me. And 'tis now eight years since this desire made me resolve to estrange my self from all places where I might have any acquaintance, and so retire my self hither in a Country where the long continuance of the warre hath established such orders, that the Armies which are intertain'd there, seem to serve onely to make the inhabitants enjoy the fruits of peace with so much the more security; and where amongst the croud of a great people more active and solicitous for their own affaires, then curious of other mens, not wanting any of those necessaries which are in the most frequented Towns, I could live as solitary and retired as in the most remote deserts.