Everything in life is in twos.
We have days and nights, light and darkness, hot and cold, right and left, early and late, literate and illiterate, prosperity and adversity etcetera.
A life full of one without the other is not only Utopian but unfair. The first man Adam ate from the tree of knowledge of good and evil and mankind was plunged into a recurring constant of opposites. It was not God’s original plan.
Although through Christ, we can now move from the effect of Adam’s choice to abundant life (because to accept Christ and follow Him is to eat from the tree of life), yet when we do, life as it is in this moment in history is still bound up in the potentialities of opposites. The new life in Christ puts man above all life’s circumstances.
Albeit, the balance of nature (creation) must occur. So, he that is alive will definitely be missed one day. Or before he/she gets missed, he misses a number of people that equilibrates (balances) his joys/comforts.
However good life here can be, it is a poor caricature of what is beyond. And we must seek/long for that. It is the steady desire towards transcendence (heavenly bliss) that neutralizes the inevitable momentary sorrows we can ever experience.
And by that we see another opposite. Earth is our current place of habitation but it takes a manageable preoccupation with yonder – meaning heaven – to contrast the pains/pleasures of the now and animate our own current version of reality.