The character in Nabokov's "Mary" experiences a profound sense of helplessness stemming from his lack of a clear desire. This absence of purpose leaves him in turmoil, as he searches for something meaningful to pursue. His struggle highlights the internal conflict between wanting to act and the paralyzing uncertainty about what to pursue.

Moreover, the protagonist's inability to take even the simplest of actions, like turning on a light, symbolizes a deeper existential crisis. The gap between intention and action appears insurmountable to him, which accentuates his feelings of inadequacy and frustration. This portrayal reflects the complexities of human desire and motivation in the face of indecision.