Just like a good tree will bear good fruit and a bad tree will only produce poor fruit (Matthew 7:16-17)…our walk with the Lord is all about fruit production.   You may have a hundred Bible verses memorized, but if you never put them into usable application…what good are they?  Here James is saying, I will show you my faith by taking what I learned and witnessed about the Lord Jesus Christ and put it into practical action.  In other words,  a work-less faith is a worthless faith when at the end of the day there is no fruit (good works) to show for it.