Each person might indeed not be able to provide her with much energy.
Ten people, a hundred people, a thousand people—perhaps that still isn't a lot.
But what about ten thousand? A hundred thousand? Or even a million, ten million, or hundreds of millions of people?
Gu Shengyin's task was to ensure that Angela lived well, so repairing the injuries on this body and recovering strength was also part of her mission.
Gu Shengyin shared her conjecture with the System.
The System's response confirmed her guess.
Originally, the Power of Faith was the best source of energy for angels. However, in today's world, where gods had been lost and people no longer held faith, they had to find an alternative method.
Everyone knew the craziness of human beings for their idols. At its core, this adoration was somewhat similar to the Power of Faith.