The important bit is:

    As long as our hypothetical Blub programmer is looking down the power 
    continuum, he knows he's looking down. Languages less powerful than Blub 
    are obviously less powerful, because they're missing some feature he's used 
    to. But when our hypothetical Blub programmer looks in the other direction, 
    up the power continuum, he doesn't realize he's looking up. What he sees are 
    merely weird languages. He probably considers them about equivalent in power 
    to Blub, but with all this other hairy stuff thrown in as well. Blub is good 
    enough for him, because he thinks in Blub.

From PG's Beating the Averages (http://www.paulgraham.com/avg.html)

A "my language is more expressive than yours" version of the Sapir–Whorf hypothesis.