Our repugnance to death increases in proportion to our consciousness of having lived in vain
~ William Hazlitt (April 10, 1778 - September 18, 1830)
I'd like to think I have enough self-awareness to know when my time as a player is done. But if for some reason, unbeknownst to me, that I couldn't see when the end was for me, I have a support group of high level hockey people, family, teammates, and friends, who give me honest assessments of my game all the time. They would tell me.