(NASB) John 8:12 “Then Jesus again spoke to them, saying, ‘I am the Light of the world; he who follows Me will not walk in the darkness, but will have the Light of life.’ ”

Have you heard the call to follow Christ, the Light of the world?
What can you be sure of regarding your faith in Christ Jesus?  If you are a follower, committed to doing what He says to do by faith believing Him to be your Savior:
He has called you to follow Him.
He has promised you that you will no longer walk in darkness.

(NASB) John 12:35-36 “So Jesus said to them, ‘For a little while longer the Light is among you.  Walk while you have the Light, so that darkness will not overtake you; he who walks in the darkness does not know where he goes.
36 ‘While you have the Light, believe in the Light, so that you may become sons of Light.”

Listen to the warning of refusing Christ – darkness overtakes anyone who has not received the Light of life, the Lord Jesus Christ.
Darkness causes stumbling around while we seek to avoid obstacles which cause untold damage.

In these same verses there is the invitation of Christ:
Anyone can have the Light (Christ Jesus) by believing in Him.
He has promised you that He is the Light and belief in Him makes you a child of Light.

Christ is the Light of the world and He calls all who are walking (living) in darkness to believe in Him!