To sin is to miss the point of human existence. It means to live unskillfully, blindly, and thus to suffer and cause suffering.
Trying to become a good or a better human being ..is an endeavor you can not ultimately succeed unless there is a shift in consciousness..
You do not become good by trying to become good, but by finding the goodness that is already within you.
Most ancient religions and spiritual traditions share the common insight – that our “normal” state of mind is marred by a functional defect. However, out of this insight into the nature of the human condition- we may call it the bad news- arises a second insight: the good news of the possibility of a radical transformation of human consciousness. In Hindu teachings (and sometimes Buddhism also), this transformation is called enlightenment. In the teachings of Jesus, it is salvation, and in Buddhism, it is the end of suffering. Liberation and awakening are other terms used to describe this transformation.
Eckhart Tolle (A New Earth)