At age 56, I still experience myself as the same guy I was at about 25. Until 25, I was more conscious of growing and changing than I have been ever since, certainly more concerned about what I might later become. (I no longer worry about becoming anything much different from what I already am -- I'm *open* to learning and developing, of course, but not especially concerned about it.) My conclusion is that 25 must be a "peak" or "ideal" age some kinda way.

Opinions differ, of course. I remember in a recent thread on "non-monetary tips received by buskers," reading of a religious tract about the afterlife that someone pressed upon one of our streetsinging members. According to that particular authority, everyone in Heaven is thirty years old -- including, I assume, even those poor souls who died as babies. So maybe 30 is the age that a spiritually healthy individual always imagines him/herself to be...