This passage talks about how some people twist the well-meant laws of the Bible. How people misread them, and how we are supposed to view them. How Christ should be at the forefront of our minds, always.
As Christians, we believe we are the recipients of incredible, undeserved generosity from God. He hasn't treated us as our sins deserve - but has poured out his mercy and kindness to us - and continues to do so every day!
One of the ways we respond to God's generosity is to give our money cheerfully and sacrificially to honour God, and make Him known.