2 Cor. 9:6-9 (ESV)
The point is this: whoever sows sparingly will also reap sparingly, and whoever sows bountifully will also reap bountifully.  Each one must give as he has made up his mind, not reluctantly or under compulsion, for God loves a cheerful giver.  And God is able to make all grace abound to you, so that having all sufficiency in all things at all times, you may abound in every good work.  As it is written,
"He has distributed freely, he has given to the poor;
his righteousness endures forever."
There is an aspect of Christian giving that comes from trust in God. We know that God will take care of our needs. This isn’t license though to be so incautious in your giving that you give more than you really can afford. Proper stewardship of God’s gifts is not just about giving to the church, but spending your money wisely at home also. If you can’t afford to feed your family maybe you shouldn’t be giving ten percent to the church. You give back to God what you can. Neither should you put God to the test so to speak, and sow bountifully, with the expectation that you will reap material benefits in this life bountifully. But God does reward us for our gifts. As Paul points that those who distribute freely and give to the poor, have righteousness that endures forever.