Come Judgment Day we will be judged according to what we have done. This is perfectly in keeping with Jesus’s declaration, “If you love Me, keep My commandments” (John 14:15).
I saw the dead, great and small alike, standing in front of his throne while the books lay open. And another book was opened, which is the book of life, and the dead were judged from what was written in the books, as their deeds deserved. The sea gave up all the dead who were in it; Death and Hades were emptied of the dead that were in them; and every one was judged as his deeds deserved. Then Death and Hades were hurled into the burning lake. This burning lake is the second death; and anybody whose name could not be found written in the book of life was hurled into the burning lake. (Revelation 20:12-15, NJB; emphasis added)
We will be judged according to our works. Faith is not mentioned here at all. What is interesting is that there appear to be two groups of people before the Throne: those whose names are written in the Book of Life and everyone else. If our names are not written in the Book of Life, we are hurled into the lake of fire. It appears from this that it’s just understood that we stand condemned if we are not in that great Book: our deeds will not have measured up. It seems that there is more going on here, though. It seems pretty clear that everyone’s deeds will be judged. That includes Christians.
We cannot rely on mere faith nor on mere deeds. We must love God and keep His commandments.