They sound similar, but they’re not.
An arc, like an arch, is bent. The strength comes from that bend.
But the arc doesn’t have to be supported at both ends, and the arc is more flexible. The arc can take us to parts unknown, yet it has a trajectory.
An arch, on the other hand, is a solid structure. It’s a bridge that others have already walked over.
Our life is filled with both. We’re trained on arches, encouraged to seek them out.
But an arc, which comes from “arrow,” is the rare ability to take flight and to go further than you or others expected.