Growing Old or Growing Up.
Growing old is mandatory, growing up is optional.
Growing old or ageing is a natural phenomenon. One can age beautifully, gracefully or one can decay into an ugly creature, but ageing is inevitable.
Growing up on the other hand is a spiritual phenomenon, and is a flowering an evolution.
Growing old happens to all animals but only a Human Being can grow up. One can imagine our lives as being akin to a tree. As the tree grows higher it is essential that the roots grow deep.
Just growing old is exactly that, ageing, it grows but the roots are shallow, rarely good for anything or anyone, not even to its self as it struggles to survive every small storm or setback. Whereas growing up is like a tree, with strong and deep roots. While it sways with the storm, it rarely ever collapses. Its strong, stable and blooms with vigour providing fruit and shade etc. while nurturing other life around it.
Sadly though this potential is available to all, only a few choose to grow up, the vast majority merely grow old. Eating, sleeping, mating they live dull and boring lives. That is why we are obsessed with seeking entertainment all the time. Unfortunately nothing can meaningfully fill the being's life.
Whichever path we tread there is a subtle difference between those growing old and those growing up. They are both constantly losing friends and relationships. The first is frantic about this; the second is at peace.