When someone has full knowing, they understand in a complete way. People have the knowledge of languages. You have the freedom to find out and learn what it is you want. Discovery is another form of freedom. It is your right to discover things without there being a rule against it.
Discovery is like a form of knowledge.
The more you discover the more you know. The more you know gives you an advantage over others. People discover things every day, such as children who just discover their toes or hands. If we were limited to discoveries that means we are limited to knowledge and that leads into language. For example what if we the people didn't discover the telephone because we weren't allowed to discover.