When you're listening to Tool, just remember that he's not like other guys. He is incredibly artistic, almost to the point where you have to be paying complete attention to him to even remotely understand him. I remember listening to him (though I can't remember whet it was), where I thought what he was saying was absolute bollocks during the listen. Then, I closed my eyes for a second, and all of a sudden what he said had an entirely new meaning. It was insane the way Tool could just become something so different when you take a look into him.
Another thing you should note about Tool is that it's easy to get a headache listening to him. Not because he's a bad person, but because of how many ideas his head is riddled with and how complex they are. Soon enough your head will fill to the brim and the rest will just sound like noise to you. Just turn it off and give him a listen the next day.
If you don't like the him, you'll definitely at least enjoy reading through the lyrics, and picking apart the song itself and all of the artistic values that go into making it the complexity that it is.