The Lord is my Shepherd

normally when I listen to the song The Lord is my Shepherd, I think about the fact that the Lord is my shepherd, and that He wants to lead me to a pasture where I will be able to partake of the word of God. Tonight, I heard it, and it struck me differently. In the second verse, it says:
Since thou art my Guardian, no evil I fear.
He isnt just my shepherd, trying to feed me the word, he also is my Guardian- and he wants to protect me. It goes on to say:
Thy rod shall defend me, thy staff be my stay. No harm can befall with my Comforter near. No harm can be fall with my Comforter near.
As my Guardian, he will protect me. His rod shall defend me. He will defend me from Satan, and wants to protect me from everything. He doesnt want any harm to come over me. He wants me to be comforted in my hard times, and wants me to be happy. The hard times will come, and Satan will attack. But we have someone better and stronger than us, a Guardian who will protect us with his staff.