Zacharias took the cup as gently as a he could, aware of the heat and not wanting to scald himself on hot porcelain. Burns would just be adding insult to injury in his mind, especially since he still wasn't sure he wanted to even bother Ernie with his own stupidity. Especially not since Ernie seemed to be busy research something. He followed Ernie to the sofa, sitting down next to him and taking a careful, small sip of tea. Mouth burns were also not an option. Then he set the cup down to let it cool a bit more as he listened to what information the other had on this mysterious spell.
That was a heavy question, Zacharias realised, though he couldn't tell if it was also rhetorical or not. Regardless, he thought on it, and the information Ernie had found out about this... ruvhesi spell. "I suppose," he began, trying to pick his words carefully so as not to accidentally make himself less coherent, "that anything is possible if you know the rules. For instances, if this spell is made to reverse the decay of plants, it would probably be disastrous to use on a human. Some spells aren't meant to be used in a catch-all sense, especially not ones that change the inherent properties of whatever they're directed at." He picked up his tea and took another small sip, then set it back down.
"I could levitate you, and I could levitate the sofa with the same spell, even if it's meant for only one, because intent is also important. But I'm not changing anything about you or the sofa. It's why transfiguration can be so difficult, which this sounds a bit like; you're actually changing something in that plant that makes it go from decaying to thriving." He paused a moment to further gather his thoughts, also making sure to check that his tone had sounded more interested, more open than potentially damning. He definitely wasn't trying to damn Ernie's idea and desire to help. He was just... cautious.
"There's also the fact that that spell must be difficult to do because of the need for balance. I'd imagine too much one way or another, and the plant wouldn't thrive but become an issue, perhaps taking over that plot and even becoming a parasitic plant, making it impossible for other plants to survive in that area. There's no knowing what it could do to a person, especially since it wasn't meant for people."
He paused again and took another sip of tea. "All that said, I don't think it's impossible that there might one day be a way to help someone with an advanced medical condition where currently it doesn't seem like there's much to do to help. And this spell, ruvhesi could be the first step. It could hold some kind of key. I just think, however, the spell itself would cause more harm than good, but that doesn't mean it can't be studied and dissected, as it were, and tried on plants first." With copious amounts of notes taken, of course. And then it would have to be tweaked and fine-tuned before it could ever be tried out on people. And before people, it might have to be tested on animals to begin understanding how it would work on something living other than a plant. There were a lot of steps to such a spell, and Zacharias thought it'd likely take years before anything solid came about from it. For now, though, he didn't mention it. Ernie would surly understand that, as well as everything else he'd said. He wasn't stupid. Or so Zacharias hoped.