is an excellent book by Jerry Weinberg (isbn 978-0932633521). As usual I'm going to quote from a few pages:
Consultants are hired for knowing what others don't know, so a consultant who stops learning soon decays in value.
It's always better to be a do-something rather than a know-everything.
The Wishing Wand reminds me of the ability to ask for what I want, and if necessary, to live with not getting it.
Modern psychology often scorns introspection and has become the study of other people's behaviour.
I personally think that big changes result from an accumulation of small changes.
Incongruence is stereotyped behaviour.
It takes big balance to learn small balance.
Nothing is immutably programmined into my mind - except its programmability. The ability of my mind to program itself is a far greater ability than any particular program.
Fear is one of the brakes on creativity.
In social engineering, as in all engineering, failures teach more than successes.