Sin at the Creation: Were people sinful at creation? Do we sin because of Adam's sin? My Sinfulness & My Obligation: How much am I responsible for my sin, and how muchis grace? What are my obligations? [John 3:19, Titus 2:14, Matthew 22:37, Luke 10:27, Deuteronomy 6:4-7]. Our Own Sinfulness vs Paying for the Sins of Ancestors: Why do we have to pay for our ancestor's sin? [Matthew 16:24-26].