No amount of power brings happiness. Eventually the body is even overcome by this quest for power and control.
Greed is the most evil of all sins.
You go a step higher and your opinion itself dissolves. Then all you speak is HIS WILL. Persistence breaks resistance.
One has to be quite humble when carrying these Mantras to the people. If there is any ego involved, the effect will be diminished actually. You can see when someone chants Mantras in this vein. Then, when someone chants with humility, it is more powerful, more pure. The Mantras themselves carry purity. Therefore everyone who chants them should bow their heads, at least in the mind.