Premanand Maharaj Ji
Why do I feel so lazy and dull, and what can replace it?
Laziness is a sign of tamoguna
Laziness, pramad, dullness and sleep are signs of tamoguna (the quality of inertia). Give up rajas and tamas and take up sattva by leaving stale, piping hot or very spicy food, onion and garlic.
Laziness, heedlessness, dullness and sleep are signs of tamoguna. One who has tamoguna within cannot do good deeds.