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Insanity is doing the same thing over and over while expecting different results.

( Jesse Livermore )

Diversification is protection against ignorance. It makes little sense if you know what you are doing.

( Warren Buffett )

I can calculate the motions of the heavenly bodies, but not the madness of people.

( Isaac Newton )

There are old traders and there are bold traders, but there are very few old, bold traders.

( Ed Seykota )

Buy not on optimism, but arithmetic.

( Benjamin Graham )

Bull markets are born on pessimism, grow on skepticism, mature on optimism, and die on euphoria.

( Sir John Templeton )

Cut short your losses, and let your profits run on.

( David Ricardo )