"The best thing for being sad," replied Merlin, beginning to puff and
blow, "is to learn something. That's the only thing that never fails.
You may grow old and trembling in your anatomies, you may lie awake at
night listening to the disorder of your veins, you may miss your only
love, you may see the world about you devastated by evil lunatics, or
know your honour trampled in the sewers of baser minds. There is only
one thing for it then -- to learn. Learn why the world wags and what
wags it. That is the only thing which the mind can never exhaust,
never alienate, never be tortured by, never fear or distrust, and never
dream of regretting. Learning is the only thing for you. Look what a
lot of things there are to learn."
-- T.H. White, "The Once and Future King"
