... not mere achievement, but rather the more difficult feat of handling your life efficiently. It means to be a success as a person; controlled, organized, not part of the world's problems, but part of its cure. ... of being creative individuals.
Believe in yourself! Have faith in your abilities. Without a humble but reasonable confidence in your own powers you cannot be successful or happy. But with self-confidence you can succeed. A sense of inferiority and inadequacy interferes with the attainment of your hopes, but self-confidence leads to self-realization and successful achievement.