Following the example of Christ, who gave of Himself for us that we might have the richness of eternal life, we are to give as much as we have decided in accordance with the instruction of the Holy Spirit inspired teachings of the New Testament.
2 Corinthians 9: 8, 9 (New King James)
So let each one give as he purposes in his heart, not grudgingly or of necessity; for God loves a cheerful giver.
And God is able to make all grace abound toward you, that you, always having all sufficiency in all things, may have an abundance for every good work.