This verse notes the key attribute (his “glory”) of a young man – his physical “strength” – as well as the key attribute (“the splendor”) of the old man – his “gray hair.” In the ancient world, a young man would have to live in the pecking order of the community where the old guys were respected and got to make most of the decisions.
But the young man could enthusiastically bring his quickness and physical strength to the table and would be essential in fulfilling the ideas and plans of the old man. The old guy, on the other hand, was a step slower and didn’t quite have the strength or stamina he used to have.
But the old man did have the life experiences and respect of others to be able to provide leadership. His gray hair reflected his years of experience and the wisdom that hopefully came with it (see 16:31).
Society needs both these guys – and their female counterparts – today. These days I’ve got the old guy thing going on. Just wish there was a good verse about old bald guys being wise!