One effect of the gospel upon the believer's heart is the creation of a new "gospeler", that is, a person who wants to tell others about the person and work of Jesus Christ. Notice that I said the person wants to evangelize. For various reasons, he may often fail to do so, bu the desire is present. And the desire isn't based upon merely wanting to live up to others' expectation, but is rather a genuine longing to see people become followers of Jesus.
Here's a few words from Donald Whitney writing in the May 2011 edition of TableTalk magazine:
at 12:33 PM