Knowledge and happiness always grow by sharing.All of us have been listening to this since childhood and everyone also knows the importance of that "whether knowledge or happiness, both grow by sharing". Yet people act on the contrary. We often see people that if they have knowledge on any specific thing, or they have a talent, then they avoid to telling the people about it, they feel that if they share their knowledge with others then competition will increase for them and hence they keep the same knowledge hidden, on the contrary, those who share their knowledge with others also increase their knowledge more than before.
There are some such people who mostly express their grief in the world and inadvertently increase their trouble, but those who share their happiness with others also liked by the people and invite happiness into their lives.
Be a little careful while sharing, because what you are sharing, will definitely get back to you, even more than before, so share happiness and your knowledge with others as much as possible.