Psychologically I should say that a person becomes an adult at the point when he produces more than he consumes or earns more than he spends. This may be a the age of eighteen, twenty-five, or thirty-five. Some people remain unproductive and dependent children forever and therefore intellectually and emotionally immature.
Henry C. Link
While one person hesitates because he feels inferior, another is busy making mistakes and becoming superior.
Henry C. Link
It is not the mountain we conquer, but ourselves.