Quote from : Star Trek II: The Wrath of Khan Movie

Carol Marcus: Please tell me what you're feeling.
Kirk: There's a man out there I haven't seen in fifteen years who's trying to kill me. You show me a son that'd be happy to help. My son... my life that could have been... and wasn't. How do I feel? Old... worn out.
Carol Marcus: Let me show you something that will make you feel young as when the world was new.