This verse is a dividing line. In the Old Testament, the sacrificial system was central to worship. But here, Solomon (and later the prophets, and Jesus Himself) issues a crucial warning: religious ritual can never replace daily integrity.
"Sacrifice"
It represents our outward religious acts: going to church, tithing, singing praise, using "gospel" language, serving in a ministry. Good things in themselves.
"What is right and just"
It represents our real life from Monday to Saturday: how we treat an employee, honesty with taxes, faithfulness to a spouse, truthfulness in our words, helping the needy.
God is saying: "Don't try to buy Me off with Sunday rituals if your Monday life is unjust." He prefers day-to-day obedience over religious performance. Ethical integrity is worth more than empty liturgy.
"The Knight in Rusty Armor" — Robert Fisher
The Knight went around on crusades and rescuing damsels (the outward "sacrifices") to prove he was good and loving. But he neglected his wife and son at home (he did not do "what is right and just" in his closest relationships). His armor only fell when he stopped performing and started truly loving.
"The Root of Rejection" — Joyce Meyer
People with the root of rejection often try to offer excessive "sacrifices" (overworking at church, trying to please everyone, being perfect) to buy God's and others' acceptance. This verse sets us free: God does not want your exhausting performance; He wants an aligned heart that does what is right because it already knows it is loved.
Jesus was the greatest critic of empty religiosity. In Matthew 23:23, He rebuked the Pharisees because they gave a tenth even of the smallest herbs (sacrifice), but neglected "the more important matters of the law — justice, mercy and faithfulness."
Christ offered the one perfect and final sacrifice on the cross. We no longer need to "offer sacrifices" to earn God's favor. Now, because we have already been accepted through His sacrifice, our response of gratitude is to live a life that reflects His character: doing what is right and just in every decision of our day.