How beautiful upon the mountains

The feet of those who walk upon the mountains crying peace are beautiful (Isa. 52:7) because they are clean from the blood and sins of their generation.
In the ancient ceremonies involving animal sacrifice, blood was shed upon the ground and the feet of those involved in the rites became bloody.  The blood of the sacrifice upon the feet became a symbol of the sins for which the sacrifice was offered.
The feet of those who walk upon the mountains crying peace are cleansed from that blood.  Christ’s washing of His Apostles’ feet was to symbolize this cleansing which He alone could provide.  He employs no servant to provide such a cleansing. (2 Ne. 9: 41.)  These feet, washed by Him are, therefore, beautiful because they connote the sanctity of the one crying peace.
 
“Crying peace” because the only thing which stills the mind of man, and brings rest from the trouble of this world, is the atonement of Christ.  That is why it is called “the rest of the Lord.”  When cleansed, it becomes the consuming desire of those who are clean to bring others to partake.  Just like Lehi’s dream, when  those who had eaten of the fruit of the tree of life ate, they immediately invited others to come and join them.
“Upon the mountains” because the mountain is nature’s symbol of the ascent to God.  The climb represents repentance and purification of the soul.  When a person stands upon the top of the mountain, she appears to be part of heaven itself and no longer earthbound.  Her profile is with the sky, symbolizing the completion of the ascent back to God.
It is beautiful.  All of it is beautiful.  All of it is a reflection of the purity and intelligence of God, whose ways are higher than man’s ways as the heavens are higher than the earth. (Isa. 55: 8-9.)