A cup is useful only when it is empty; and a mind that is filled with beliefs, with dogmas, with assertions, with quotations, is really an uncreative mind.
We cannot always control our thoughts, but we can control our words, and repetitionimpresses the subconscious, and we are then master of the situation.
It is said that power corrupts, but actually it's moretrue that power attracts the corruptible. The sane are usually attracted byother things than power.