The essence of mathematics lies in its freedom.

Success comes when preparation meets opportunity.

We're not in the junk business. We're not in the business of making a lot of products. We're in the business of making great products.

 释义：贫穷和地位低下不是什么耻辱的事，但因为贫穷和地位低下而向他人谄媚奉承，乞求得到施舍，就真是耻辱。