God comes right out and tells us why he gives us more money than we need. It's not so we can find more ways to spend it. It's not so we can indulge ourselves and spoil our children. It's not so we can insulate ourselves from needing God's provision. It's so we can give and give generously (2 Corinthians 8:14; 9:11)
Does not the Old Testament promise that God will prosper His people? Indeed! God increases our yield so that by giving we can prove that our yield is not our god. God does not prosper a man’s business so he can move from a Ford to a Cadillac. God prospers a business so that thousands of unreached peoples can be reached with the gospel.
Given our abundance, the burden of proof should always be on keeping, not giving. Why would you not give? We err by beginning with the assumption that we should keep or spend the money God entrusts to us. Giving should be the default choice. Unless there is a compelling reason to spend it or keep it, we should give it.
[God] wants you to go home, look at your bucket of seed, and determine in your heart how much you'd like to sow. He wants you to consider thoughtfully your current circumstances, your life, your potential, and your finances. He wants you to involve your family. He wants you to pray about it. And then He wants you to come up with a plan.