Want of simple ideas that men are capable of having, but having not,( 1) Because their remoteness, or, Secondly, Another great cause of ignorance is the want of ideas we are capable of.

As the want of ideas which our faculties are not able to give us shuts us wholly from those views of things which it is reasonable to think other beings, perfecter than we, have, of which we know nothing; so the want of ideas I now speak of keeps us in ignorance of things we conceive capable of being known to us.

Bulk, figure, and motion we have ideas of.

But though we are not without ideas of these primary qualities of bodies in general, yet not knowing what is the particular bulk, figure, and motion, of the greatest part of the bodies of the universe, we are ignorant of the several powers, efficacies, and ways of operation, whereby the effects which we daily see are produced.
These are hid from us, in some things by being too remote, and in others by being too minute.

When we consider the vast distance of the known and visible parts of the world, and the reasons we have to think that what lies within our ken is but a small part of the universe, we shall then discover a huge abyss of ignorance.