Sometimes when I play a point n click adventure and I am stuck for hours on a puzzle I tend to think: I've tried everything... surely there must be some kind of bug for why I am not proceeding.

Only to then realize (after reading the walkthrough) that there was indeed a way.

I think it's human nature to find (rather search) blame not only in yourself but everywhere else... anyhow, since the author is reflective we should be forgiving as well.