The writer of this Psalm was trying to create a sense of strength and fearlessness that only comes from the Lord. He is trying to say that with the Lord in your heart you have nothing to fear from this life. With complete and total trust in Him we have nothing to fear. It is fear in our lives that keeps us from accomplishing or even trying to accomplish many things in our lives. With God completely in our hearts we should not have any fear because he will lead us into the right direction. Strength in our lives comes from opening our hearts to Him and we shall have nothing to fear from our enemies that will step up to try and defeat us. Fear can be paralyzing. It is this fear that the author is trying to show us we shouldn't have due to the Lord...