The good works that really matter require the help of heaven. And the help of heaven requires working past the point of fatigue so far that only the meek and lowly will keep going long enough. The Lord doesn't put us through this test just to give us a grade; he does it because the process will change us.
The Book of Mormon is another testament of Jesus Christ, and we learn about Him in its pages. We know that it has great power. It has the power to change lives. It has the power to convert. If you read it with an open heart, you will know that it is the word of God and that it is true.
It will comfort us when we must wait in distress for the Savior's promised relief that He knows, from experience, how to heal and help us. The Book of Mormon gives us the certain assurance of His power to comfort. And faith in that power will give us patience as we pray and work and wait for help. He could have known how to succor us simply by revelation, but He chose to learn by His own personal experience.
God's purpose in creation was to let us prove ourselves. The plan was explained to us in the spirit world before we were born. We were valiant enough there to qualify for the opportunity to choose against temptation here to prepare for eternal life, the greatest of all the gifts of God.