Throughout your life advance daily, becoming more skillful than yesterday, more skillful than today. This is never ending. Matters of great concern should be taken lightly. Matters of small concern should be treated seriously. Among one’s affairs there should not be more than two or three matters of what one could call great concern.
-The Hagakure
Ghost Dog 
It occurs to me that advancement must adapt to changing circumstances. Skills developed can be lost with age or physical impairment, but the attitude of advancement to me means finding ways to overcome the new limitations, or to work around them.
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