Evangelist Louie Giglio, speaking during the last day of the Hillsong Conference in Sydney Friday, shared about how he was lifted by God's grace from a more than two-month struggle with the physical and emotional symptoms of stress and depression.

"Almost four years ago, I woke up in the middle of the night and I felt like I was dying. I literally thought, 'this is it, my heart is going to blow open and I am going to die right here, right now,'" Giglio said before thousands of people at Allphones Arena and an online audience. "I could not breathe."

For a long time, doctors were unable to properly diagnose the problem, the founder of the highly successful, youth-orientated Passion Conferences said.

"It started a journey for me - the worst part of it lasted about two months - and it was the darkest time of my life ... I didn't know what to do and every day was a different symptom, every day was a different manifestation of something ... I was going crazy," he explained.

He said there was one particular night, after waking up night after night at 2 a.m. in a "dark cloud" of panic and anxiety that he said a simple prayer, "God, please help me."

Giglio said he then remembered a passage of Scripture that says "God gives songs in the night."

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