"[That age] is enough time to have shaken off childhood naivety and the wild scheming of teen-aged years without losing the energy and enthusiasm of youth," Donna Dawson, a psychologist, told Fox's Washington, D.C., affiliate. "Innocence has been lost, but our sense of reality is mixed with a strong sense of hope, a 'can do' spirit, and a healthy belief in our own talents and abilities."
As the site pointed out, Jesus Christ was crucified at age 33. Oh, and "33-year-old celebrities like Jennifer Love Hewitt, Maroon 5 front man Adam Levine and Katie Holmes seem to be enjoying a wealth of success right now."