"In your Primer you have a resource that will make you highly educated, 
but it will never make you intelligent. That comes from life. Your life up to 
this point has given you all of the experience you need to be intelligent, but 
you have to think about those experiences. If you don't think about them, 
you'll be psychologically unwell. If you do think about them, you will become 
not merely educated but intelligent, and then, a few years down the road, you 
will probably give me cause to wish I were several decades younger."