http://dilbert.com/blog/entry/what_is_t ... e_made_of/

Scientists have identified a number of elemental particles that are not known to be made up of smaller particles. But how do you wrap your head around the idea that something is made of nothing but...itself? Is it absurd, illogical, or just hard to understand?

Now suppose we someday determine that these elemental particles are indeed made of something else. It just pushes the question down a level. The moment we discover the new and smaller substance, we wonder what that is made of, and so on forever, or until...what?

Consider the possible answers. [...]
Very interesting blog post, and a very interesting comment discussion following.