I know what it is. You're just naturally great! But your self discipline to keep at all the climbing you've been doing over and over and pushing yourself all the time might have a little something to do with it too. Now you have me wondering. What do you think it takes to be a real climber, if you don't fill the bill? Congratulations on feeling good about making so much measurable progress in many very important ways.
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It's all downhill from here. Except the parts that are uphill.