Age gives you a great sense of proportion. You can be very hard on yourself when you're younger but now I just think 'well everybody's absolutely mad and I'm doing quite well'.
Children also have artistic ability and there is wisdom in there having it! The more helpless they are the more instructive are the examples they furnish us and they must be preserved free of corruption from an early age.
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Save your money. You're going to need twice as much money in your old age as you think.