He who goes out must fight. Those who want to avoid the struggle must stay inside. To completely avoid the struggle by staying inside is a theoretical point of view. It is the extreme of yin.
Avoiding the fight where possible. Be inside when it is possible. This is a practical point of view.
Being outside when it requires our survival. Strive for a position of low struggle that enables us to be on the inside. Not relying on struggle to achieve that position.
Focusing on softness and avoiding conflict so as not to be at the mercy of the escalating game of combat. Being outside does not only mean fighting. It also means actively avoiding the struggle. Being inside does not only mean resting. Being inside means gaining strength to be able to exist outside.
That is balance. There is this balance in ourselves, in our relationships, in our society. The greater the systems in which yin and yang strive for balance, the greater their effect in the extreme. The state in extreme yang is a destructive force. The state in extreme yin rests and loses its earthly existence. The state in balance heals the world. When the world is healed, we have regained paradise.