It all goes back to reverence and seeing God in everything and everything in God. Through my need for efficiency, I might have used a sterling silver butter knife to pry open a paint can. Sin is not that I broke the knife, but the attitude of disrespect for the limitations of sterling silver which God placed there and gave to us. Sin is also my disregard for the importance to another human being of that piece of silver. You may check out your behavior against the demands of the Ten Commandments and find you haven't violated any of those.
Sin is more relational than that.
More than the Ten Commandments are the personal covenants which God has made with us through all of creation. Sin is how we violate, ignore and freely choose to replace God's prior relationship with an object or person with my own self-centered blue print. Ignatius offers us his picture of God's always working, laboring to attract and support us. God's mercy is above all other works. His forgiving our violations of God's covenants with us, but even more, God intensely desires us to come more and more alive, alert, aware and sensitive to His presence in His presents.