So these things are described very vividly in Upaniṣad, how guṇa-sanga acts. Just like a fire. There are sparks. The sometimes the sparks fall down from the fire. Now there are three conditions of the fire spark falling down. If the spark falls down on dry grass, then it can immediately ignite the grass, the dry grass. If the spark falls down on ordinary grass, then it burns for some time, then again it becomes extinguished. But if the spark falls down on the water, immediately extinguished, the fiery quality. So those who are captured by the sattva-guṇa, sattva-guṇa, they are intelligent. They have got knowledge. Just like brāhmaṇa. And those who are captured by the rajo-guṇa, they are busy in material activities. And those who have captured tamo-guṇa, they are lazy and sleepy. That's all. These are the symptoms.