People don't _think_ about it, but a sense of our time limit is part of our 'human condition'. e.g the phrase 'you only live once'. 'You only live once, but for

People don't _think_ about it, but a sense of our time limit is part of our 'human condition'. e.g the phrase 'you only live once'. 'You only live once, but for 700 years' has quite a different feel to it.