“War is peace. Freedom is slavery. Ignorance is strength.” – All of these things are kind of opposites and contradicte themselves. It is meant to be a very powerful quote.
“If you want to keep a secret, you must also hide it from yourself.” – If you think about the secret you want to keep then because you are thinking about it you might want to tell others as its fresh in your mind. So if you dont think about it you will be able to keep it. Kind of like mind of matter. If you dont think about something you are alot less likely to do it or in this case say the secret.
“Who controls the past controls the future. Who controls the present controls the past.” –