Achievement to most people is something you do; to high achiever, is something you are. Your character growth determines the height of your personal growth.
People will cling to an unsatisfactory way of life rather than change in order to get something better, for fear of getting something worse. You've to give up to grow.
All leaders are influenced by those they admire. Reading about them and studying their traits inevitably allows an inspiring leader to develop his own leadership traits. It's hard to improve when you have no one but yourself to follow.
The potential that exists within us is limitless and largely untapped. When you think of limits, you create them. Growth always increases your capacity.