O homem superior é aquele que cumpre o seu dever, sem se preocupar com o resultado.

The past is never dead. It's not even past.

I will hazard a prediction. When you are 80 years old， and in a quiet moment of reflection narrating for only yourself the most personal version of your life story， the telling that will be most compact and meaningful will be the series of choices you have made. In the end， we are our choices. Build yourself a great story.

密码学的目标是使破解系统的成本超过受保护信息的价值。

早规划、早行动，方能成功。