Every man according as he purposeth in his heart, so let him give; not grudgingly, or of necessity: for God loveth a cheerful giver.
The motivation to give for a cause should be based on our desire to help build the kingdom of God, and reach out in some way to help someone who has a need. We live in a world where everyone is looking out for self, and seeking to gain just a little more. This is demonstrated when Jesus spoke about the man who wanted to tear down his barn and build bigger ones to store his riches. (Luke 12:18). There is no wrong in wanting to increase your financial standing. We are told to be good stewards of what God has given us. Being forced to give what God has allowed us to earn is not really giving from the heart. Out of necessity, we pay taxes, we don’t give taxes. Out of necessity (the principle of tithing) we pay ten percent of our earnings to God’s work. This giving was established in the OT to support the work of the priesthood. Paul says, don’t let your giving be done because you're compelled by some law, but let your giving be done from the heart with cheerfulness that you are doing it for God and His cause. The principle of reaping and sowing is demonstrated in how you give. The more you give cheerfully, the more God’s grace will be abound to you. Delight in giving of your means to the Lord, and he will give you the desires of your heart, and always provide you with what you need