To understand matters rightly we should understand their details; and as that knowledge is almost infinite, our knowledge is always superficial and imperfect.
Why can we remember the tiniest detail that has happened to us, and not remember how many times we have told it to the same person.
It is necessary, in order to know things well, to know the particulars of them; and these, being infinite, make our knowledge eversuperficial and imperfect.