For what is known of such general ideas, will be true of every particular thing in whom that essence, i.e.that abstract idea, is to be found: and what is once known of such ideas, will be perpetually and for ever true.

So that as to all GENERAL KNOWLEDGE we must search and find it only in our minds; and it is only the examining of our own ideas that furnisheth us with that.

Truths belonging to essences of things (that is, to abstract ideas) are eternal; and are to be found out by the contemplation only of those essences: as the existence of things is to be known only from experience.

But having more to say of this in the chapters where I shall speak of general and real knowledge, this may here suffice as to the universality of our knowledge in general..