Memories, Dreams, and Perceptions

"Our whole past store of memories floats

beyond its margin, ready at a touch to come in;
and the entire mass of residual powers, impulses,
and knowledges that constitute our empirical
self stretches continuously beyond it.

So vaguely drawn are the outlines
between what is actual and
what is only potential at any
moment of our conscious life,
that it is always hard to say of
certain mental elements
whether we are conscious of them or not."

— William James (1842-1910)The Varieties of Religious Experience