Read "On Opinion, Belief, and Knowledge" by Baruch Spinoza online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
To begin our consideration of the modes of which man consists, we shall state (1) what they are, (2) their effects, and (3) their cause.
As regards the first, let us begin with those that are first known to us: namely, certain ideas or the consciousness of the knowledge of ourselves, and of the things which are outside us.