You can recognize truth by its beauty and simplicity.
When you get it right, it is obvious that it is right
—at least if you have any experience—
because usually what happens is
that more comes out than goes in.
...The inexperienced, the crackpots, and people like that,
make guesses that are simple,
but you can immediately see that they are wrong,
so that does not count.
Others, the inexperienced students, make guesses that are very complicated,
and it sort of looks as if it is all right,
but I know it is not true
because the truth always turns out to be simpler than you thought.