Willpower is the strength of ...

Willpower is the strength of character to persevere, even when the going gets tough.
Willpower is the strength of character to persevere, even when the going gets tough.
 Unknown

More phrases

Who sows virtue reaps honor.
He who conquers himself is the mightiest warrior.
The fixed determination to have acquired the warrior soul, to either conquer or perish with honor, is the secret of victory.
 George S. Patton
We are all warriors. Each of us struggles every day to define and defend our sense of purpose and integrity, to justify our existence on the planet and to understand, if only within our own hearts, who we are and what we believe in.
 Steven Pressfield
See first with your mind, then with your eyes, and finally with your body.
 Yagyu Munenori

Quotes from the same author

The successful warrior is the average man, with laser-like focus and a chair that's not obtained from Craigslist that keeps poking into his back.
 Unknown
Honor your father and mother (this is the first commandment with a promise),.4 Fathers, do not provoke your children to anger, but bring them up in the discipline and instruction of the Lord.
 Unknown
Put yourself in a state of mind where you say to yourself, "Here is an opportunity for me to celebrate like never before, my own power, my own ability to get myself to do whatever is necessary".
 Unknown
Shopping online is fantastic for comparison shopping, because never before have you had the ability to see all the prices offered from everybody at one time.
 Unknown
Aim for success, not perfection. Never give up because you will lose the ability to learn new things. Move forward with your life.
 Unknown