This Ask an Eastern Orthodox Christian column explores what the EOC Church and Church Fathers say about Hinduism, as well as a comparison of the two faiths.
In general, positive actions (such as helping people and being generous) lead to good experiences and happiness, while negative actions (such as harming others and being deceitful) lead to bad experiences and unhappiness.
I’d be a fool persuading any reader to accept a definitive answer to this question, because there’s theory — lots of it — and then there’s personal experience, the learning of karma’s truth over time.