I don't criticize myself; I criticize my body.
I think that the only way that you really keep it a secret is by not telling anyone.
The secret of success is to make your mind work for you - not against you. This means constantly being positive, constantly setting up challenges you can meet - either today, next week, or next month etc.
There is nothing like chess to keep the brain smart, and give it a workout.
You have to do everything possible to win no matter what.
You have to remember something: Everybody pities the weak; jealousy you have to earn.