Innovation is not just about technology; it's about changing the way people think and live.

The tears of the world are a constant quantity. For each one who begins to weep, somewhere else another stops. The same is true of the laugh.

The only thing that is certain is uncertainty.

If you are ready to give up everything else and study the whole history and background of the market and all the principal companies whose stocks are on the board as carefully as a medical student studies anatomy—if you can do all that and in addition you have the cool nerves of a gambler, the sixth sense of a clairvoyant and the courage of a lion, you have a ghost of a chance.