Power is not a means, it is an end. One does not establisha dictatorship in order to safeguard a revolution; one makes the revolutionin order to establish the dictatorship.
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.
You only have power over people so long as you don't takeeverything away from them. But when you've robbed a man of everything he's nolonger in your power he's free again.