When her children were young, author Madeleine L'Engle used to take them on nighttime visits to the top of Mohawk Mountain, not far from the family's 200-year-old Connecticut farmhouse.

The goal was to glimpse the mystery of God.

"If you need one image of God, then go outside on a clear night and look straight up at the stars. That's about as good as I can do," L'Engle told me, in 1989 during a two-hour interview before some Denver lectures.

The wonders of science and heavenly light are at the heart of her classic novel "A Wrinkle In Time." However, she said she knew that she needed to include some specifics to clarify her central message -- without clubbing young readers over the head.

"It's a work of fiction, not theology. I didn't write it expecting to get challenged on every last detail," she said.

However, she was willing to state one fact for the record, offering a variation on a quote she repeated through the years. Yes, she loved stargazing, she said, but ultimately, "I can understand God only as he is revealed in the Incarnation of Jesus of Nazareth.”

L'Engle died in 2007 at the age of 88, after publishing 60 works of fiction, non-fiction, drama, poetry and prayers. Her work is back in the news because of debates about Disney's $103-million version of "A Wrinkle In Time," which removed the book's religious images and biblical quotes.

At the time of the 1989 interview, L'Engle was already involved in talks about bringing "A Wrinkle In Time" to movie theaters -- a process that led to a low-budget, made-for-TV flop in 2004. That film downplayed her Christian imagery, as well.

It would be hard, explained L'Engle, to grasp this book's cosmic war between life and death, good and evil, darkness and light without two crucial passages.