Mr. Market is kind of a drunken psycho. Some days he gets very enthused, some days he gets very depressed. And when he get really enthused you sell to him, and if he gets depressed, you buy from him. There's no moral taint attached to that.
Warren BuffettInvesting in a market where people believe in efficiency is like playing bridge with someone who has been told it doesn't do any good to look at the cards.
Warren BuffettWe really can say no in 10 seconds or so to 90%+ of all the things that come along simply because we have these filters.
Warren BuffettMost people get interested in stocks when everyone else is. The time to get interested is when no one else is. You can't buy what is popular and do well.
Warren Buffett