Most of the time, people perceive things that are empty and devoid of content to be worthless. Only things that are filled with content are generally viewed as being valuable. However, Korean culture and customs take a different view of the matter.
The Korean phrase gong literally translates to "empty." It is often used in the context of a person's mind. However, rather than describing a person who simply doesn't know anything, it often indicates that an individual has been able to clear their mind of distracting and unnecessary thoughts. This is considered desirable.
The human mind can only hold so much at one time. Therefore, those who never take any time to clear out their old thoughts and ideas may soon find there is no room for new ones. Every once in a while, it is important to clear some mental space and achieve an empty state of mind.
This is one of the most effective ways through which an individual can achieve their personal growth plan. Just about everyone has things they want to achieve in life. However, it can be difficult when they are never able to progress past the thoughts they had last week. Emptying the mind on a regular basis can be an important part of developing as a human.
For people to understand the benefits of a clear brain, they may need to completely change the way they look at the world. In Western society, it is common for people to take the view that more is always better. But sometimes less actually is more. Developing a better understanding of this is one of the keys to personal development.