As soon as we understand Kṛṣṇa, the next result is that after leaving this material, this present material body, we go at once to the kingdom of Kṛṣṇa. This is the whole process. Tyaktvā deham . . . tyaktvā dehaṁ punar janma naiti mām eti kaunteya (BG 4.9).
Then he does not come again to this miserable world. He goes back to Godhead, back to home. And what is that home? That you'll find: yad gatvā na nivartante tad dhāma paramaṁ mama (BG 15.6).
Such description is there also in the Bhagavad-gītā, what is the position of that transcendental world. Na tad bhāsayate sūryaḥ: there is no . . . there is no need of the sun; there is no need of the moon; there is no need of electricity. That is mentioned in the Bhagavad-gītā. So this is this world. This material world is dark, is always dark. Therefore here we require the sun and the moon and the electric light. Otherwise, it is dark. As soon as the electricity will fail, then whole city will be in darkness.
So the nature of this . . . and the Vedic mantra also says that "Don't remain in this darkness." Tamaso mā jyotir gamaya (Bṛhad-āraṇyaka Upaniṣad 1.3.28): "Just try to transfer yourself in that illuminated world." Jyotir gamaya. Jyoti means illumination. So this world, this material world, is full of darkness. Darkness, one meaning of darkness is ignorance. And another darkness, you know, without . . . absence of light. So this nature of this material world is darkness.