And that is why Paul gives it as a living principle in II Corinthians 9:6: "But this I say, he who sows sparingly will also reap sparingly, and he who sows bountifully will also reap bountifully," which includes, and very importantly includes, our service. We have seen this principle at work in people's lives, not only in the world but especially in the church. This living principle implies that if we are stingy with God, He is going to withhold blessings from us, whether in our character or our prayers or our growing, our overcoming, our studying, our thinking, our finances. The whole lifestyle that we have must be a serving one.
Brethren, this is the way God works within all of His creative efforts. His way of life is one of giving and producing more as opposed to the get-whatever-one-wants-at-the-expense-of-others in Satan's zero-sum system.