Dullness, drowsiness, and falling asleep: The hindrance of Laziness and Lethargy create dullness and drowsiness, but it’s mostly due to the Lethargy. Lethargy is a decrease in mental energy that manifests as a comfortable, pleasant dullness of perception, or as heavy drowsiness. As mental activity dies down, mental energy falls, as do interest, awareness, and responsiveness.
