Soul remains the same in all births only body changes, Soul has the power to heal every area of life but we need to open ourselves. The soul reincarnate in the different bodies until all KARMA are not healed and balanced. If our soul is happy from our actions we will have blessed life but if not happy with the actions we do, it blocks our life.
When the soul gets activated it guides us, helps us and helps in improving our life, even soul has the power to prevent sickness.

How we can make our soul happy?

Human Life works according to the Law of Attraction. Positive thinking/actions will attract positive outcome and negative will attract negative. By doing good deeds we can make our soul happy for blessed life.