falsity of perception...
"what convinces us is not necessarily true, it is merely convincing" (Nietzsche, 1968)
Never forget that :)
weltanschauung \`veltân'shaûng\ [n] Gr.: world view | a conception of the course of events in, and of the purpose of, the world as a whole, forming a philosophical view or apprehension of the universe | the general idea embodied in a cosmology
nihilismus [n] Gr. En nihilism \n'Iul`izum\: Nothingness | nihility | a viewpoint that traditional values and beliefs are unfounded and that existence is senseless and useless | a doctrine that denies any objective ground of truth and especially moral values