What does it mean to wait with an expectation of goodness? It’s not being naïve about the dark; in fact, it’s just the opposite. You only carry oil if you think the dark will last a long time. They are not fools.
But you can live in the dark and carry the light of Christ at the same time. Especially if you are preparing for something good. Peace. Loving-kindness. Compassion.
It takes tenacity, but it is possible. And what this parable tells me, is that it’s exactly what Jesus wants for us, and for this world.