Your love for God is greatly determined by your generosity to give when people around you are in desperate need of something. Giving is not just limited to financial support (although it is essential part of your service), but it also extends to your time and spiritual support. God instituted Church to be the primary avenue in which we exercise generosity not just in terms of money, but also in terms of committing our lives (time & talents) for the growth of the church. Church is a community which reveals our love for God and our understanding of His generosity in the way we conduct ourselves with people.
In the Bible, God sets aside His redeemed people primarily to fellowship with Him and to glory Him by reflecting His character through His people in this world. God is glorified when His redeemed people show certain marks that remind the world about God and His kingdom. In this passage, we learn how sincere love for others and constantly fighting sin in our lives through repentance and overcoming temptation, are the ongoing marks of a true Christian.