He guessed it right when the next thing he saw was Willem widen his eyes as if he just got a sudden realization. Willem looked like he just changed into someone else after Gizach whispered to him.
A demon's whisper was not merely a whisper. It came in a low voice, but a human would be able to catch it. After the human heard it, they would consider whether they should follow the provocation or not.
Yes. A human would still have a chance to choose whether they should do what the demon wanted to do or not. If a human had a good heart, then the probability for them to ignore the provocation was still high.
In contrast, if humans had a seed of bad nature even just so little, then it was still possible if they ended up following the demon's provocation.
That was how demons worked in the human world. It was not an easy job because some humans were still true to their good nature, and the demons would end up failing their mission if that happened.
