Can we change our fate?

We have inherited something from our parents. It is encoded in our genes and we are expressing it. Can we change it during the course of time as we live on.

As is is always said, work hard and you will get results. Isn't it the stressed condition for our cells or is it the happy environment for the cells? Scientifically, more specific biologically?

What makes the cells and finally ourselves think that we are capable of doing something which we found difficult at some point of time.

Is IT EVOLUTION? Or, REALLY WE HAVE CHANGED OUR CODE WITH A MUCH SLOWER RATE?