" i think thertefore I am", means Descartes is thinking so he must be alive. It's his perspective of life, just to sit there and think all day. While others perspective of live is positive. Make creations, bulid, be famouse, get an education. "I think there for I am", relates to i'm thinking so im not asleep dreaming. If you can think you must be awake this isn't a fantasty. "I think there for I am" also relates to people who dont think must not really be alive." Thinking means the brain is working. If your bain is not thinking your not working and you must not be alive, In Descarte's point of view.