Impacting the Soul

We say that the soul or our highest Self is the purest and the most perfect thing that exist. Yet, physical experiences on earth shape our lives in different ways. So is there an impact to the Soul if the individual is having a decent life filled with love and kindness, or one with anger and hatred? Is there a risk that the Soul becomes imperfect, after a negative physical experience here? And what would be the purpose of physical experience if our soul is already perfect?