One of the reasons why we are not aware of our changes and our ways of growth is that we do not review the day, the week or the month that has passed by. We simply try to live and not give a general overview of our past.
There might be some failures, some accomplishments, but we are not aware and we tend to let them go without realizing their importance.
We should learn from our failures and be grateful for our accomplishments. The more we review the past and have an objective approach towards it, the more we can benefit and improve our results. We have to overcome our past selves, and not compete specifically with anybody else.