Unfortunately, as most humans have not found any sense of deep fulfillment within themselves, they are constantly hankering for dominance. When power becomes a means to dominate, it becomes ugly.
We need to understand that power is not just political or economic, there are better ways to be powerful - the power of love and compassion, and above all, the power of being human.
To be powerful is a possibility to create - nothing can be created without power. It is very important that every human being should be a powerful human being because the opposite of being powerful is weakness.
Weakness should not be celebrated just because power has been misused by some. Power by itself is not corruption.
If humans have a deep sense of fulfillment within themselves and are seeing what they can create for everyone's wellbeing, power is a wonderful thing.
To be powerful need not necessarily mean having power over somebody else; you can just be powerful in your very presence. The more absent one's personality becomes, the more powerful his presence becomes.
This is the essence of spiritual 'sadhana', that if you dissolve your personality, your life presence becomes very powerful.
Look at spiritual beings of the past. Thousands of years have passed, but their work still continues. If you use the power of your mind, your work has a larger lifespan.
So the most enduring sort of power is to realise the power within. When I say "the power within," I am talking about that dimension which is the very source of creation. Once you seek this power, power is not corruption, it is divine.