Power is insatiable: the vice of energetic men and the strongest drive in the lives of important men. The more power is experienced, the greater the love of power.
In an autocratic regime, the holders of power become more tyrannical when they experience the delights that power brings. The man who moves from the love of power is more willing to inflict pain than to permit pleasure.

The love of power

People desire to be admired. Vanity needs glory for its satisfaction. Even from childhood, children are always performing some antic, and demand to be looked at.

Vanity

Bertrand Russell, at his Nobel Prize Acceptance Speech, pointed out that all human activity is prompted by desire. If you want to know what man will do, you must know the whole system of their desires with their relative strengths.Humans have some infinite desires, which can never be fully gratified. The four endless desires are acquisitiveness, rivalry, vanity, and love of power.

Infinite desires

Acquisitiveness is the desire to possess as much as possible of goods, or the title of goods. Regardless of how much you acquire, you will always wish for more.

Acquisitiveness

From the need to dominate the unknown comes the desires like the pursuit of knowledge and all scientific progress. How you use this power depends upon the social system and your abilities.

Love of power is not always negative

The desire to escape from boredom is very powerful to almost all human beings. 
But a great deal of modern work is sedentary so we most find other means to use our physical energy that produces love of excitement. And nothing is more exciting than a moment of sudden discovery or invention.

The love of excitement

Many men will happily face impoverishment if they can thereby manage to ruin their rivals.

Rivalry

Bertrand Russell (May 18, 1872-February 2, 1970) endures as one of humanity's most lucid and luminous minds - an oracle of timeless wisdom on everything from what "the good life" really means to why "fruitful monotony" is essential for happiness to love, sex, and our moral superstitions.

The love of excitement

The Four Desires Driving All Human Behavior: Bertrand Russell's Magnificent Nobel Prize Acceptance Speech

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