When I was a child ambition meant climbing steps as quickly as possible without nicking my shins on the way up. My mother was often sick so I ran her errands. I shopped at the grocery store and did her banking. I was six years old. When I entered the bank, the tellers fussed over me, smiling and giggling, because I was so small that I could hardly reach the window to make a deposit. Still, I reached higher and that meant standing on my...