The most important thing about a theory is that it explains the facts.

文章的难以精工，就像器物的难以制成一样。

In theory, there is no difference between theory and practice. But, in practice, there is.

"El silencio es el lenguaje de Dios; todo lo demás es una pobre traducción."

I don't think President Bush is doing anything at all about Aids. In fact, I'm not sure he even knows how to spell Aids.

Je est un autre. Tant pis pour le bois qui se trouve violon, et nargue aux inconscients, qui ergotent sur ce qu'ils ignorent tout à fait!