The beauty of mathematics is that it is one of the few areas of human endeavor where absolute truth can be known.

The market is always changing, and so should your strategies.

性情圆融随和的人没有诡诈的神态，精明细心的人没有苛刻审查的心思，行为方正的人没有乖戾的行为，沉默的人没有陰险的手段，诚信笃实的人没有无能的牵累，光明正大的人没有肤浅的缺点，刚直的人没有性情上的偏失，果决的人没有拘泥的毛病，达练的人没有轻浮的外貌。

Look at me.We all have marks on our face. I have this wrinkle here from your first surgery.I have these wrinkles here from your last surgery. This is the map that shows us where we’ve going.And this is the map that shows us where we’ve been.And it’s never ever ugly.

解释：兄弟之间虽然会因谗言而起争执，但在遇到外人的侮辱时仍应一致对外。