As individuals we grow and change.
Some can bring up our past, times before we knew what we know now.
But, "that was then and this is now."
If we live good lives with best intent, we do grow and change. We develop over time, our work gets better, and we are able to impact with greater effect.
That doesn't mean that challenge won't occur and greater growth will come as life is a continued path of learning and changing and growing and developing.
If we live well, we do change--we'll change our minds, our goals, our activity, and attitudes.
The key is to change well, and move forward in ways that matter--matter to your good life and to the lives of those you impact.