Salvation is by grace through faith alone, and that only authentic grace saves from sin and unto righteousness.  When someone is saved, his life will produce the fruit of good works, which is what salvation looks like.  So much is accomplished through that salvation, including the purpose of man’s existence, God’s glory and pleasure.  We want to be saved.  It’s a must, and so the production of the righteousness, the works, is also the assurance of the salvation itself.  Our security is found in the work of Christ, but our own assurance is found in our works.  This is a good thing.  You can’t have assurance, that is, know you are saved, unless you see the works in your life that salvation produces.  Those are laid out in scripture.  You want to be honest with those.  It doesn’t do any good to short shrift the works to something less than what indicates salvation.  When that is the case, someone thinks he’s saved, when he isn’t.  You aren’t working for your salvation after your saved, but you are working for the blessing of assurance.  You’ve got to do that work, but you also will.  If you are not, then why not?  If you are, then you can do those things.  It shouldn’t be a problem to be challenged to do them.  You should expect it just like you should expect to do those things that accompany salvation and thereby show that you’ve been saved.