timewise

I'm afraid that my faith in age has faltered somewhat as I have begun to accumulate years with a seemingly increasing speed. I come across old people who act very young, and young people who act very old. I think that I, like most people, am somewhere in between the two, and often both at once. What then, if not time, can be used as a measuring stick for all that composes the life of a person? I've heard several postulates, but I have to admit that one of my favorites is application of the knowledge accrued—wisdom. I hope that I am more wise now than I was twelve months ago. Trouble is, unlike time, wisdom is harder to measure, so I can't tell exactly how old I am.