The-Conquest-of-Happiness-by-Bertrand-Russell

sausages innumerable; the other said: ‘What is pig
to me? My own works are far more interesting and
wonderful than any pig.’ He refused pig and set to
work to study his inside. When bereft of its natural
food, his inside ceased to function, and the more he
studied it, the more empty and foolish it seemed to
him to be. All the exquisite apparatus by which the
delicious transformation had hitherto been made
stood still, and he was at a loss to guess what it
was capable of doing. This second sausage
machine was like the man who has lost his zest,
while the first was like the man who has retained
it. The mind is a strange machine which can
combine the materials offered to it in the most
astonishing ways, but without materials from the
external world it is powerless, and unlike the
sausage machine it must seize its materials for
itself, since events only become experiences
through the interest that we take in them: if they do
not interest us, we are making nothing of them. The
man, therefore, whose attention is turned within
finds nothing worthy of his notice, whereas the man
whose attention is turned outward can find within,