Here is explained why we should behave as unreally as possible:

"We must accept the so-called reality around us, the woodlouse in the cellar no less than the evening star.  It's only we ourselves who are unreal—partly just because we are aware of the fact.  And as a result we contradict ourselves.  Would you try to build a house of sand?  You wouldn't move a finger to do so.  Because you know that the house would collapse at once.  And all that we do here is equally pointless.  It drifts away like writing in the sky.  We come from the unknown, linger a lifetime, and drift away again.  Better not to act as if we were real.  We should behave as unreally as it is possible to behave in reality. ... [I]t is we on earth who are really on the Other Side.  Because we are still on the wrong side of reality, even though it surrounds us.  That means that fundamentally we are capable of everything except being real." —Ernst Kreuder, The Attic Pretenders