From jealousy to being proud
Showing people how to do things, or just getting started is great. Seeing them pick up the topic and getting on their way on the path you have shown them feels nice. But working with talented people capable of learning you soon notice them surpassing your own knowledge.
It can quickly make you feel jealous of their skills. They become better at what you were while you are stuck there just trying to share what you know. They go beyond your knowledge and start creating things you couldn't even imagine doing. At least not with a formidable commitment to learn more about the topic.