Purity of heart is to will one thing.
The only thing that is impossible is the thing you don’t try.
凡是有不和的地方,我们要为和谐而努力;凡是有谬误的地方,我们要为真理而努力;凡是有疑虑的地方,我们要为信任而努力;凡是有绝望的地方,我们要为希望而努力。
You have to have confidence in your ability, and then be tough enough to follow through.