quick Polish lesson

The thing that gets me about Polish is, well, everything. It's so damn hard, but specifically the declinations are just never-ending. Every time I learn a new case and what it does to the adjectives and nouns I think I've climbed this mountain and come to the top, whereas in fact I've stepped over a pebble on the hill in the lowlands by the mountain that is the Polish language.
It has its funny moments though. Like when you learn that yes is tak and no is nie. Except that yes is also no, apart from the odd ocassion when no no really does mean no. Got it?