Learn what we should learn; do what we should do; be what we should be.

Related:

• What we have to learn to do we learn by doing. -- Aristotle,
  Ethica nicomachea II (c. 325 B.C...
• SMILEY :} What should we call these?
  (what...
• What we hope ever to do with ease, we must learn first to do with diligence.
  Samuel Johnson (1709...
• Interfere? Of course we should interfere! Always do what you're best at,
  that's what I say. -- Doctor...
• Why should we do anything for Posterity?
  What's the bugger ever done for us...
• We are what we do,
  not what we say...
• The only thing we learn from history is that we do not learn.
  Earl Warren That men do not learn very much from history...
• We learn from history that we do not learn from
  history. ...
• We should all do what, in the long run, gives us joy,
  even if it is only picking grapes or sorting laundry...