32 If I am lifted up from the earth, I will draw all people toward me.” 33 Jesus said this to show how he would die.34 The crowd said, “We have heard from the law that the Christ will live forever. So why do you say, ‘The Son of Man must be lifted up’? Who is this ‘Son of Man’?” 35 T​​hen Jesus said, “The light will be with you for a little longer, so walk while you have the light. Then the darkness will not catch you. If you walk in the darkness, you will not know where you are going. 36 Believe in the light while you still have it so that you will become children of light.” When Jesus had said this, he left and hid himself from them.—John 12:32-36 (NCV​)
When ​Jesus​ used the words “if I b​e lifted up” the people seemed to understand that He meant He would have to die. They immediately respond that they thought that the Christ would live forever. So, to them if He were going to die, He couldn’t be the Messiah for whom they had been looking . They do not grasp the concept of the resurrection and eternal life.
1 In the beginning there was the Word. The Word was with God, and the Word was God. 2 He was with God in the beginning. 3 All things were made by him, and nothing was made without him. 4 In him there was life, and that life was the light of all people. 5 The Light shines in the darkness, and the darkness has not overpowered​ ​it.—John 1:1-4 (NCV)
​After the resurrection and the coming of the Holy Spirit, we now have the light living inside of us and we are the light of the world. The Holy Spirit leads us into all truth as we study the word of God. So, we have the light interanlly with the Holy Spirit and we have the light externally with God’s Word.
105 Your word is like a lamp for my feet​ and a light for my path.—Psalm 119:105 (NCV)
There is no reason for us to walk in darkness. Every where we go, we should dispel the darkness.
“You are the light that gives light to the world. A city that is built on a hill cannot be hidden.—Matt. 5:14 (NCV)