We would still be trying to figure out how to light a fire if someone wouldn’t have shared with others the technique to do so. Sharing it’s at the basis of evolution and life.
Spontaneously sharing with others keeps things circulating. This constantly happens at a cellular level in order to keep organisms alive; Cells constantly share nutrition and information amongst one another in order to keep the greater whole (i.e. your body) functioning properly.
Never be afraid to learn something new and never be afraid to pass it along, it will enrich others as well as yourself.
Here is a nice tool that allows you to share with others snippets of your learnings as well as learn unexpected things! Check it out at Snipwits.com