The quality of the space, warm, cool, busy, or calm, depends on our sense of ourselves. When our self arises, there is always space. The activities that arise in that space influence our sense of being separate or apart from our situation. Whenever we are aware of space between our body and our situation, our practice is to dissolve the intervening space. When there is no space, there is no personal self.
Buddhist practice is to dissolve our personal self and realize our true self.
The prevalent view is that our self is synonymous with our inner world. Our tendency is to identify with our thinking and emotions. Based on this belief, it is easy to identify with and attach to our thinking and emotions. We bind ourselves to our inner world. We assume our consciousness, our self, is this thinking and emotions.