The true light, which gives light to everyone, was coming into the world, and the world was made through him, yet the world did not know him. John 1:9-10 (ESV)
John calls Jesus the true light. When something is true, we know it to be real. We know that fact to be as stated. In present-day language, we know something that is true to be the real deal.
However, John lets us know that the world, which was made through him, did not know Jesus. The Pharisees and the Sadducees chose not to believe his message. We have this condition here in the present age. Some people have chosen not to believe in Jesus and some have never had the opportunity to meet Him.
As we come to know Jesus as the King of our lives, we learn to wait on Him and His direction for our lives. Sometimes have to search the scriptures for His words to tell us what we must do. We may have times when all we can do is follow His leading and wait for the outcome He has planned.