Great thoughts, aimecook. However, I take "the only thing that exsist is the space between breaths" one step further in that there is actually no space at all. While we perceive the space to be empty, there are subatomic particles that connect all things. We are all connected to each other even if we cannot physically see or feel HOW we are connected.
While I feel things in life can exist without their opposites, I agree we need their opposites or some other point(s) of comparison in order to properly define what those things are.