I've always liked that quote, because it really goes both ways. We see languages change over time, when we learn what one language is good for and start to incorporate some of that thinking into another. e.g. we're seeing `class` syntax in es6, but that's been present in many other languages for a while. PHP has been adding improved support for `list()`, which is basically its way for managing tuples, something very popular in the Python world. The right way to make this progress isn't by just blindly dumping syntax from one language into another, but by learning many and having it change the way you think.