This is the fourth book of John Locke's Essay Concerning Human Understanding. His book deals with knowledge and probability. He asks how far knowledge can go, if there are universal propositions, what are judgment and probability and deals with faith, reason and enthusiasm.
John Locke: An Essay Concerning Human Understanding: Book. But to prevent such unjust and groundless imputations, I tell them, that I am not for taking away any helps to the understanding in the attainment of knowledge. And if men skilled in and used to syllogisms, find them assisting to their reason in the discovery of truth, I think they ought to make use of them. All that I aim at, is.