“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 decided in his heart, 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.’" - 2 Corinthians 9:6-9
Giving not only promotes God’s work through us, but also God’s work in us, our sanctification. Giving requires much self-denial and self-crucifixion, but it also weakens and even breaks our sinful and selfish nature, allowing us to find joy in a deeper dependence on Christ.
When we give sacrificially, for the benefit of others, to advance the Kingdom and care for God’s people, we are preaching the Gospel message.