A drug addict had two sons. One led a miserable life like his father's, but the other was successful. The sons were each asked what made them live the way they did. Both said that it was because of their father. It indicates that the important thing in leading a successful life is not one's conditions or circumstances. It depends on the individual mindset. "Watch over your heart with all diligence, for from it flow the springs of life" (Proverbs 4:23).