"Lucifer whispers that life's not fair and that if the gospel were true, we would never have problems or disappointments...The gospel isn't a a guarantee against tribulation. That would be like a test with no questions. Rather, the gospel is a guide for maneuvering through the challenges of life with a sense of purpose and direction." --Sheri L. Dew.
The gospel is there for us to cling to with both hands as we trudge through the challenges of life and watch our testimonies blossom. Lucifer would have as believe that it's unnecessary, limited, or false. He waits for us to stumble so we can be led astray, but we can hold to the faith we have and carry on, carry on, carry on!