“This is how I want you to conduct yourself in these matters. If you enter your place of worship and, about to make an offering, you suddenly remember a grudge a friend has against you, abandon your offering, leave immediately, go to this friend and make things right. Then and only then, come back and work things out with God”

This is my interpretation:

If you’re in the middle of a worship service and remember that someone has offended you or upset you, or if you need to make the relationship right, don’t even finish the song you’re singing. Don’t wait one minute, but go to that person immediately and do everything in your power to make it right.

Wherever you are, whatever you’re doing, if you see that you haven’t been as good a friend or brother or sister or parent as you could have been, go make it right. If you realize you’ve been taking a relationship for granted, go make it right. If God brings to your attention someone you’ve been neglecting, go to that person and make it right again.

After that, you can truly worship. You can truly raise your hands to God in praise. Then you’ll be ready to see God work in your life.