"Whatever does not proceed from faith is sin" .. Romans 14:23b
So we sin (as you said) when we transgress the Law by doing what we should not do (sins of commission), but we also sin whenever we fail to obey God by not doing what we know we should be doing (sins of omission).
We also sin if our otherwise righteous actions are done w/o regard for a weaker brother, or a non-Christian .. e.g. Romans 14:20-23.
"Whatever does not proceed from faith is sin" .. Romans 14:23b
So we sin (as you said) when we transgress the Law by doing what we should not do (sins of commission), but we also sin whenever we fail to obey God by not doing what we know we should be doing (sins of omission).
We also sin if our otherwise righteous actions are done w/o regard for a weaker brother, or a non-Christian .. e.g. Romans 14:20-23.
Romans 14:23 is a good one and is often missed or not thought about much. Thank you for bringing it up. I think we as Christians should go about our day in loving God and loving others via the faith in everything we do. When we wake up to make coffee, or to clean the house, or to pay the bills, or to go to our jobs, these things all should be done with the glory of God in mind as a part of the faith. They are minor things... yes; But we do have to live in this world to serve God via by loving God and loving others (Spreading the gospel, helping the poor, feeding the sheep, etc.).