What you perceive, what enters your awareness, is the second moment of the act. What is taken in, if that is the right term, is set forth as to be known within the frame of the known world in which you as subject are found. It is knowingly the second moment, it acknowledges, even is deferent to the original moment, which is but does not appear. Instead there is a theory of perception, a diagram of object and subject, of taking something in from outside. The diagram is cognate with the rest of the theory of the world, but there can be no direct experience to back it up. How the original moment of perception takes place is a mystery, at least to any conceivable theory of the world.