A true Christian is a person that repents and believes in the person and work of Jesus Christ alone for salvation. We can add nothing to what Jesus has already done for us for salvation. The only reason a true Christian does good works is because it is God working in and through them. They are a new creation in Christ Jesus. We are saved to do good works not saved by them!
Here is a link to the full video this was taken from: http://www.sermonaudio.com/sermoninfo.asp?SID=51814165135
message title is Biblical Tests of True Faith. This message was preached by Paul Washer.