"If you were offered the chance to live your own life again, would you seize the opportunity? The only real philosophical answer is automatically self-contradictory: 'Only if I did not know that I was doing so.' To go through the entire experience once more would be banal and Sisyphean-even if it did build muscle-whereas to wish to be young again and to have the benefit of one's learned and acquired existence is not at all to wish for a repeat performance, or a Groundhog Day. And the mind ought to, but cannot, set some limits to wish-thinking. All right, same