What use is it, my brothers and sisters, if someone says he has faith, but he has no works? Can that faith save him? If a brother or sister is without clothing and in need of daily food, and one of you says to them, “Go in peace,be warmed and be filled,” yet you do not give them what is necessary for their body, what use is that? In the same way, faith also, if it has no works, is dead, being by itself.
But someone may well say, “You have faith and I have works; show me your faith without the works, and I will show you my faith by my works.”
James 2:14-18
James points out that being a Christian involves demonstrating our faith by our works.
Our works reveal a lot about our faith. Some, may say, "I do not have much, so I cannot help others." But at the same time, everyone has time and we may though financially poor, be able to help others through service - like mowing the neighbor's lawn or helping a stranded motorist change a flat tire or delivering food for the local food pantry or giving cooking tips to another customer at the grocery store or in any of hundreds of other ways.
Our works show our faith to the world. And, showing our faith is how we bring others to know Jesus.