"Bridges lead to bridges, and roads lead to roads."
We are all used to using completely different standards to classify many experiences and situations in life. However, maybe we don't understand that bridges and roads are often indistinguishable:
A road that you think will never end may actually be a short bridge with a beginning and an end; and a small bridge that you think can be dismantled after crossing may actually be a long road that you will never finish in your lifetime.