The spirit soul is ānandamaya. As Kṛṣṇa, or the Absolute, the Supreme Personality of Godhead, is ānandamayo 'bhyāsāt (Vedānta-sūtra 1.1.12), sac-cid-ānanda-vigrahaḥ (Bs. 5.1). So simply by merging into the Brahman existence, one cannot become ānandamaya. Just like you are going very high in the sky. So to remain in the sky, it is not very ānandamaya. If you can get shelter in some planet, then it is ānandamaya. Otherwise, you have to come back again on this planet.
So nirviśeṣa, without varieties, there cannot be any ānanda. Variety is the mother of enjoyment. So we are trying to . . . we are disgusted with these material varieties. Therefore some is trying to make these varieties zero and some is trying to make these variety impersonal. But that will not give us the exact transcendental pleasure.
If you can go up into the Brahman effulgence and take shelter of Kṛṣṇa or Nārāyaṇa . . . there are innumerable planets in the Brahman effulgence. They are called Vaikuṇṭhaloka. And the topmost Vaikuṇṭhaloka is called Goloka Vṛndāvana. So if you are fortunate enough to take shelter in one of these planets, then you are eternally happy in blissful condition of knowledge. Otherwise, simply to merge into the Brahman effulgence is not very safe. Because we want ānanda.
So in impersonal zero standard there cannot be any ānanda. But because we have no information, the Māyāvādī philosopher, of the Vaikuṇṭha planets, they come back to these again to this material planet. Āruhya kṛcchreṇa paraṁ padaṁ tataḥ patanty adhaḥ (SB 10.2.32).
Adhaḥ means in this material world. That I have explained many times. There are so many big, big sannyāsīs, they give up this material world as mithyā, jagan mithyā, and take sannyāsa, and then again, after a few days, they come to social service, politics. Because they could not realize what is Brahman. They, for ānanda, they have to take part in these material activities.