As it turned out, he was right to say only time will tell if he is really cultivating with heavenly lightning or not. This was because after an hour of baking his golden core in heavenly lightning and life force, he was able to come to a conclusion about the feasibility of his project.
He said to himself, "There is good and bad news. The good news is that I can really cultivate lightning. The bad news is that it is going to consume a lot of life force."
There was some bad news, but it wasn't enough to stop him from smiling.
After running out of life force to continue the project, he checked his golden core to see if the strengthening that he felt was permanent or not. When he saw that the strengthening was permanent, he couldn't stop smiling.
