Why are we sinners?
We are sinners because we are children of Adam, not because of specific actions or omissions. All humanity was in Adam, and by virtue of Adam's sin, every person is born a sinner. The sinful, rebellious attitude against God began with Adam and is inherited by his descendants.
Les teaches that we are not sinners because of what we do, or because of what we have done, or because of what we have not done. Instead, we are sinners because we are children of Adam. He emphasizes that we were all in Adam, and it is by virtue of Adam's sin that you and I are born sinners. The context also describes a sinful, rebellious attitude against God.