People differ in intelligence, which is in large part the ability to learn and transform. People have very different personalities, as well. Some are active, and some passive. Others are anxious or calm. For every individual driven to achieve, there is another who is indolent. The degree to which these differences are immutably part and parcel of someone is greater than an optimist might presume or desire. And then there is illness, mental and physical, diagnosed or invisible, further limiting or shaping our lives.
