Billy Graham's daughter, 70, opens up about devastating diagnosis

Billy Graham's daughter shared her journey of battling breast cancer in a new blog post.

Christian evangelist Anne Graham Lotz and author likened the cancer diagnosis to gold being refined, saying God is testing her and removing imperfections.

She explained: "He has recently stoked the fire under me! I’m encouraged when I remember that when a refiner purifies gold, he melts it in a pot over the fire."

Anne added that God knows exactly how hot the fire needs to be "in order to bring the impurities in our hearts, minds, and lives to the surface of our attention."

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She adds that God tests her in many ways, referring to a day in August back in 2015 when she found her husband, Daniel Lotz, unresponsive in a pool.

The 78-year-old died two days later, just two days before the couple would have celebrated their 49th anniversary.

Two years to the day after she found him in the pool, Anne was diagnosed with breast cancer. The date also corresponds with the Passover.

Anne believes it's not a coincidence that she received the diagnosis on the same day both her husband and Jesus died, despite the centuries that separate them.

"Jesus died on the very same day of the week, at the very same time of the day, crushing the head of the serpent, forever defeating the devil and death. Praise God!"

Anne asked members of her congregation to pray for her during this trying time and ask that God heals her "in whichever way He deems would bring Him the most glory."

She believes that through this trial, she would bring glory to God and magnify Jesus "until the Refiner sees His own reflection mirrored in my life."

Anne's father, renowned evangelist Billy Graham died of natural causes back in February, at the age of 99. Billy Graham said his daughter was the best preacher in their family.