Perfect! Even if a room is fully dark, turning on a light bulb makes us see it because it emits its own light. Whereas if there is sunlight, we can see a tree even if it doesn't emit any light on its own because it is reflecting the light of the Sun.

Notice that for us to be able to see an object, the light must either be emitted from its surface, or reflected from its surface. That is, the light must leave the surface of an object for us to be able to see it. But, that is not possible in the case of a black hole. Because nothing, not even light, can leave its surface!