A gift

It's the most valuable thing one could have received in life — a critical mind. It must be used consciously, like anger, because it can be both a tool or a weapon. Use it right, it will bend the strongest of wills; use it wrong, it will break the stoutest of hearts.

A critical mind can be used to see through people. It can penetrate almost anything in the world. The best results are achieved when it turns upon itself, when the mind examines itself critically.