Interpretation:
When people realize what God is doing, they will be able to sweep their hearts by themselves. What is God showing us? God lets us see our ominous future, by showing us what fates will appear if we act on these negative thoughts we have in our minds. God shows us our future fates. People will understand that what we sow, we will reap. By this understanding we can sweep our minds of evil thoughts, preventing fate from accumulating in our hearts. When this happens, only joy will come from our hearts.
Heaven's Truths, in Living the Joyous Life 