We know TMTOWTDI as Perl's motto. But there is another language which have the same motto: Ruby. However, two language have crucial difference. While Perl is the first postmodern language, Ruby is the first Babel-17 language. What's Babel-17 computer Language? Why is Ruby Babel-17? I'll talk about Perl from a point of Rubyist's view, and difference between Perl and Ruby.