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.

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Sylvia Plath. Interesting poetess whose tragic suicide was misinterpreted as romantic by the college-girl mentality.
I think there was the studio mentality for a long time that women and girls can relate to a male hero, but boys and men can't relate to a female hero.
 Jennifer Lawrence
Every great dream begins with a dreamer. Always remember, you have within you the strength, the patience, and the passion to reach for the stars to change the world.
 Harriet Tubman
Difficulties are meant to rouse, not discourage. The human spirit is to grow strong by conflict.
 William Ellery Channing
You must do the things you think you cannot do.

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.