Read Psalms 121:1&2  In ancient Israel, there were different times of the year. They had to plant their crops in the spring.  They had to prune the grape vines.  That means to trim them back, so they would produce more grapes. Then the fall was the time to harvest the crops and to bring them in to the barns.  After this busy time of the year was an easier time.  This was the time when they went out to war, and this was the time when they protected their cities from their enemies.  Most of the warfare took place out on the flat plains where their soldiers could move around and horses and chariots could move around.  But many times, the king would keep some soldiers in reserve.  He kept them back and hidden in the surrounding hills to be used when he needed them.  If the king's armies began to be lose the battle, the enemy would get excited and think that they were about to win.  That was exactly the time for the king to call his reserve soldiers out of the hills to reinforce the weary soldiers who were being defeated by the enemy.  When the king's tired soldiers heard the war cry of their friends rushing down from the hills to rescue them, these weary soldiers would forget their fear and tiredness and gain the encouragement to fight the enemy once again.  The enemy, who thought they were about to win, would become totally discouraged with the fresh soldiers rushing down on them from the hills.  In our verses, King David said that he was looking to the hills - not for reserve soldiers - but to the Lord.  David knew that his help was not from reserve soldiers, but his help was from the Lord God who made everything!  You can depend on God's help.  When you get discouraged, be like those weary soldiers.  Look up to God who "made heaven and earth."