Two is the answer to a lot of things. Two wings allow a bird to fly, two arms can form a hug to one another. Two people can become "One" in marriage. When things aren't working, the balance is surely off, in respect to many areas.
We can look back and see the lineage while moving forward. We simply cannot see the future by simply looking forwards. Hopes and dreams are only there if the future time is there for us to be there too.
A bird flying in the sky is soaring with its own peace and comfort only lowering himself to feed and swoop down for a meal. Normally, we are always on the ground and it can feel like an impossible mission to gain the "Free Flying Spirit."