Don't worry too much, don't make unnecessary hopes, don't make unwarranted sadness, but try to stand on your own feet and maintain your own personality.

Dreiser

Perhaps nothing is more important than a firm determination in personality. If a little boy wants to be a great man in the future or play an important role in any aspect, he must make up his mind not only to overcome thousands of obstacles, but also to win after thousands of setbacks and failures.

Roosevelt