From his very profound student, Ludwig Wittgenstein: “Some philosophers (or whatever you like to call them) suffer from what may be called ‘loss of problems’. Then everything seems quite simple to them, no deep problems seem to exist any more, the world becomes broad and flat and loses all depth, and what they write becomes immeasurably shallow and trivial. Russell and H.G. Wells suffer from this.”

What he said. (Hat tip: Adam Morton.)