See The Light Meaning
(idiomatic) To come into the world or to public notice.
Example: Once I was lost in darkness, but now I have seen the light.
1948, Hank Williams, I Saw the Light, from Randal Myler, Hank Williams, Mark Harelik, Hank Williams: The Music and Legend of Hank Williams, page 59
I wandered so aimless, life filled with sin
I wouldn't let my Dear Saviour in
Then Jesus came like a stranger in the night
Praise the Lord. I saw the light.
Finally, near the end of the meeting, John saw the light and withdrew his objections.
His book never saw the light.