Classical Philosophy: Causation and Knowledge

The following text was sitting in my notes. I don't know where I copied it from:

""" Philosophically, the collapse of metaphysics can be traced back to the Scottish philosopher David Hume (1711–1776), who argued that we never actually perceive one event causing another. We only experience the 'constant conjunction' of events, and do not perceive a metaphysical 'cause'. Similarly, Hume argues (without using the actual terms) that we never know the self as object, only the self as subject, and we are thus blind to our true natures.[18] More generally, if we only 'know' through sensory experience (seeing, touching, etc.), then we cannot 'know' or make metaphysical claims. """