The Scum Is Compatible

"Their fellow mortals?" they muttered as they knitted their brows.

"What's wrong with giving it to a fellow mortal?" Yu Wen asked, feeling puzzled.

The other sect leaders and elders were similarly puzzled. How can giving spiritual energy to their fellow mortal be a problem? Weren't they cultivators also share their spiritual energy with the others? As Cheng Sheng said, they are still considered mortals as they haven't reached immortality yet. They are sharing their spiritual energy to the others, but they didn't feel anything wrong with it. 

So, why did Cheng Sheng see it as a problem if they don't see it as a problem? 

Cheng Sheng heard Yu Wen asked and he turned to him. "Because this power of faith… this kind of spiritual energy – " he spoke as he took a deep breath. " – is not compatible with the body of the mortals." He answered.