While tracking down the exact PDF by "Ng" might be a digital wild goose chase, the message is not lost. The message is available in the sermons of Dan Mohler, the books of Watchman Nee, and—most importantly—in the Gospel of John.
"I was burning out trying to start a non-profit. Nathan Ng's PDF told me to just invite my garbage man to dinner. Six months later, he came to Christ. I didn't need a building; I needed a grill." – Normal Faith Ng Pdf
She reached the end of the folder. The last PDF was dated 2015-01-19.pdf —a year before Mamá Ng’s stroke. It read: While tracking down the exact PDF by "Ng"