But that there are degrees of spiritual beings between us and the great God, who is there, that, by his own search and ability, can come to know?
Much less have we distinct ideas of their different natures, conditions, states, powers, and several constitutions wherein they agree or differ from one another and from us.

And, therefore, in what concerns their different species and properties we are in absolute ignorance.
28.

Secondly, Another cause, Want of a discoverable Connexion between Ideas we have.
SECONDLY, What a small part of the substantial beings that are in the universe the want of ideas leaves open to our knowledge, we have seen.
In the next place, another cause of ignorance, of no less moment, is a want of a discoverable connection between those ideas we have.

For wherever we want that, we are utterly incapable of universal and certain knowledge; and are, in the former case, left only to observation and experiment: which, how narrow and confined it is, how far from general knowledge we need not be told.

I shall give some few instances of this cause of our ignorance, and so leave it.