When you think of the wisest person you've ever known/know, what is it that you're missing in terms of reaching that wisdom?

Is it age, experience, education, life events? I always think of my old cancer research mentor as the wisest person I know and what I don’t have that he has are vasts amounts of knowledge in multiple areas and his life experience – he’s much older than myself…now, of course, I don’t think being older makes one wiser but in his case, it works