John 1:4 In Him was life, and the life was the light of men. 5 And the light shines in the darkness, and the darkness did not comprehend it.

Jesus came as the light of the world, and yet people chose to remain in darkness rather than come to the light.  Why is that?  Jesus tells us the answer to that question.  Would you like to know His answer?

John 3:18 “He who believes in Him is not condemned; but he who does not believe is condemned already, because he has not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that the light has come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For everyone practicing evil hates the light and does not come to the light, lest his deeds should be exposed. 21 But he who does the truth comes to light, that his deeds may be clearly seen, that they have been done in God.”

Only those who practice evil hate light.  They hate it because it will expose their deeds.  Darkness is everything that disagrees with the truth of God. Darkness interferes with His will and denies His good intentions.

In John 12:34, a group of people were in darkness because they were mistaken about Christ, and Jesus had to correct their thinking.

John 12:35 Then Jesus said to them, “A little while longer the light is with you. Walk while you have the light, lest darkness overtake you; he who walks in darkness does not know where he is going. 36 While you have the light, believe in the light, that you may become sons of light.” These things Jesus spoke, and departed, and was hidden from them.

Notice how Jesus made it very clear.  He who walks in darkness does not know where he is going.  The people had a wrong idea that caused them to question something Jesus had spoken about being lifted up.

That confusion meant they were in darkness and led Jesus under the anointing of the Holy Spirit to instruct them concerning light.  Jesus desires to make sons of light.  But pay close attention to how it says Jesus spoke, departed, and was hidden from them.  They did not believe as they should and continued in darkness.

Darkness opposes the truth in any form.  Darkness rejects the good things promised by God to His children and presents God in the wrong light.  It requires light breaking through to expel all darkness.  The light of the gospel is rightly given based on New Covenant understanding without any mixture of the Old.  When there is a mixture, there is darkness because it obscures the truth about how God relates to those who are His now in Christ.

Light is needed at all times, and the truth is light.  Jesus is the way, the truth, and the life.  He is the truth concerning the manner in which the Father wants to be seen.  He revealed the Father with every good thing He did and the truth He spoke.  That which does not accord with the testimony of Jesus concerning the Father is darkness.  But when we believe the testimony of Jesus, we have light.  I encourage you to know His testimony and walk in the light always.