The incident at the hospital was just a minor interlude. Lin Feng, using this method to divert attention, handed the "Divine Water" to the beautiful and tempting uniformed nurse, Liu Yanru. Even if Liu Yanru found out later that the Divine Water was effective, she would only think it was the magic of that specific bottle of drinking water and wouldn't associate it with Lin Feng again.
Doing good deeds is about not seeking recognition. This has always been Lin Feng's attitude, following the example of Uncle Lei Feng. Of course, Lin Feng had a deeper intention to keep his abilities a secret. He had not yet fully entered the state of Cultivation; he merely possessed some magical powers thanks to The Twenty-Four Calming Sea Pearls!