Ben Hammersley wrote a good post yesterday (below) about the importance of sharing, he used the analogy of a tree falling in the woods. However, a tree falling in a wood exaggerates the importance of posting online without sharing. 

There are now over one billion websites and  30 trillion webpages on the Internet. Taking the tree analogy then; if a website is a tree, a webpage would be a leaf. In this scenario, publishing a new post would be not like a tree falling but a leaf growing. One leaf, on one tree, in a forest with a billion trees. 

Put like this, if you don't share your content, it may as well have never been created.