Secondly, we demonstrate our love for God by our service to each other. In Matthew 25 Jesus tells the famous story of the sheep and the goats. The way he separates the sheep from the goats is separating those who showed love to Him in practical ways and those who didn't. Our service to each other, our acts of kindness to each other are acts of kindness to the Lord Himself. Third, we demonstrate our love through our giving.
Extra gifts go extra places, but the tithe goes to the church.
That tithe enables the church to be sustained, ministries to be funded, needs to be met. But not only this. God is honored when we honor Him in our finances. The church gives us the opportunity to show our love for God in a tangible way through our attendance, our service and our giving. In Hebrews 10 the author talks about the difficulty of our spiritual walk and the necessity of persevering in our faith.