Original Sin

36 Did Adam act for himself alone in the covenant of life?
No. He represented the whole human race.

37 What effect did the sin of Adam have on you and all people?
We are born guilty and sinful.

38 How sinful are you by nature?
I am corrupt in every part of my being.

39 What is the sinful nature that we inherit from Adam called?
Original sin.

Questions and Answers 36-39 in First Catechism https://www.gcp.org/ProductDetail.aspx?Item=020030