The Reader's Key Ideas from The 48 Laws of Power
by Robert Greene

For the future, the motto is, “No days unalert.” Nothing should catch you by surprise because you are constantly imagining problems before they arise. Instead of spending your time dreaming of your plan’s happy ending, you must work on calculating every possible permutation and pitfall that might emerge in it. The further you see, the more steps ahead you plan, the more powerful you become.

Do not be frivolous with such a critical matter. The gods of power frown on the frivolous; they give ultimate satisfaction only to those who study and reflect, and punish those who skim the surfaces looking for a good time.

Any man who tries to be good all the time is bound to come to ruin among the great number who are not good. Hence a prince who wants to keep his authority must learn how not to be good, and use that knowledge, or refrain from using it, as necessity requires.

• THE PRINCE, Niccolò Machiavelli, 1469-1527