He who is able to conquer ...

He who is able to conquer others is powerful; he who is able to conquer himself is more powerful.
He who is able to conquer others is powerful; he who is able to conquer himself is more powerful.

More phrases

Courage - a perfect sensibility of the measure of danger, and a mental willingness to endure it.
 William Tecumseh Sherman
I'm pretty conservative when it comes to money. My parents were very working class and constantly working. There was always a very strong work ethic and that's put a more conservative, "save for a rainy day" mentality into me.
The kind of group mentality that we had lived under since the Second World War is starting to erupt, and the craving for individualism is now much stronger. It's not as taboo anymore, as it was when I was younger.
 Nicolas Winding Refn
The overall similarity is probably in the mentality of law enforcement officers. There's a sense of wanting to really uphold a sense of morality and make sure that the laws are enforced to the letter, whenever possible.
 Benjamin McKenzie
Courage is rightly esteemed the first of human qualities... because it is the quality which guarantees all others.

Quotes from the same author

New beginnings are often disguised as painful endings.
He who controls others may be powerful, but he who has mastered himself is mightier still.
He who knows others is wise. He who knows himself is enlightened.
One who is too insistent on his own views, finds few to agree with him.
Kindness in words creates confidence. Kindness in thinking creates profoundness. Kindness in giving creates love.