" Our job is to pile up yearly advantages over the performance of the Dow without worrying too much about whether the absolute results in a given year are a plus or a minus. I would consider a year in which we were down 15% and the Dow declined 25% to be much superior to a year when both the partnership and the Dow advanced 20%. I have stressed this point in talking with partners and have watched them nod their heads with varying degrees of enthusiasm. It is most important to me that you fully understand my reasoning in this regard and agree with me not only in your cerebral regions, but also down in the pit of your stomach. For "

― , Warren Buffett's Ground Rules: Words of Wisdom from the Partnership Letters of the World's Greatest Investor