And the dark street winds and bends (8)
When we think of a street, winding and bending off into the distance, we can't help but think of something else that winds and bends so much we can't tell where it's going: the future. This dark and windy road just might be a metaphor for what lies ahead. While the future may be the most exciting unknown to explore, it might help to take a step back, and explore something that helped us in our past, all the way back to our childhoods: the imagination.
We shall walk with a walk that is measured and slow (10)
This description of the pace of the exploration makes us think this journey might be an epic one. Perhaps there's such a long journey ahead of us, we have to measure our energy, walking slowly and determinedly into the unknown.
For the children, they mark, and the children, they know (15)
It wouldn't suit quite a few adults to think of children as their guides on some unknown exploration. Adults often scoff at children because they think they're too young or they don't know enough. This poem, though, points to something children know better than the rest of us: that is, the way to having a good time using only our imaginations. Go to any nursery school at play time and you'll see what we mean.