Language is the key to understanding higher mental processes.

我们无法仅依靠理性来认识因果关系。

建筑必须是庇护所和象征。

We shall not cease from exploration, and the end of all our exploring will be to arrive where we started and know the place for the first time.

I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection.  

The past is always changing, because we are always changing our relationship to it.