Light is essential for life to exist. Without light plants, animals and man would be left in a state of darkness. The spiritual aspect of man in his fallen state exists in darkness. Jesus, the Light of the World, brings light and life to the spiritual body of mankind.
Light was created before the plants and animals because they needed light in order to live. Light is needed not only to live but to see. In actuality we don't really see anything anyway but a reflection of light off another object. Fallen man is in a state of darkness, unable to see his sins because there is no light to reflect on them. That doesn't mean the sins are not there, just that they need light to be shed on them to be seen. Jesus, the Light of the World, does just that, and a whole lot more. He lights the way to eternal life. When one accepts Him, He fills that person with light and creates a beacon through that person to the rest of the world lost in darkness.
John 8:12 (KJV)
Then spake Jesus again unto them, saying, I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life.
John 9:1-7 (KJV)
And as Jesus passed by, he saw a man which was blind from his birth. 2 And his disciples asked him, saying, Master, who did sin, this man, or his parents, that he was born blind? 3 Jesus answered, Neither hath this man sinned, nor his parents: but that the works of God should be made manifest in him. 4 I must work the works of him that sent me, while it is day: the night cometh, when no man can work. 5 As long as I am in the world, I am the light of the world. 6 When he had thus spoken, he spat on the ground, and made clay of the spittle, and he anointed the eyes of the blind man with the clay, 7 And said unto him, Go, wash in the pool of Siloam, (which is by interpretation, Sent.) He went his way therefore, and washed, and came seeing.
John 12:34-36 (KJV)
The people answered him, We have heard out of the law that Christ abideth for ever: and how sayest thou, The Son of man must be lifted up? who is this Son of man? 35 Then Jesus said unto them, Yet a little while is the light with you. Walk while ye have the light, lest darkness come upon you: for he that walketh in darkness knoweth not whither he goeth. 36 While ye have light, believe in the light, that ye may be the children of light. These things spake Jesus, and departed, and did hide himself from them.
John 12:44-46 (KJV)
Jesus cried and said, He that believeth on me, believeth not on me, but on him that sent me. 45 And he that seeth me seeth him that sent me. 46 I am come a light into the world, that whosoever believeth on me should not abide in darkness.
Though some have chosen to worship the sun for the light it brings to the world, Jesus is the source of light for the sun. He is the Light of the World, the one to be worshipped for the eternal light and life he brings our souls as well as the temporal light and life during our stay on the earth. He can fill me with that light enabling me to shed light on a lost and needy world and show them the way to the Light.
I will live my life in the Light of Jesus Christ, knowing that in Him I can not walk in darkness. By walking in His Light, Christ can be reflected through me and become a Light for others. Therefore, I need to keep my eyes focused on Him each day so that all I see is Jesus, the Light of the World.