The impersonalist Māyāvādīs, they undergo severe austerities, penances, and rise up to the Brahma effulgence, becomes merged into it, but again falls down. Just like the spark: it enters the flame of the fire, but there is again chance of falling down.
So sāyujya-mukti . . . sārūpya-mukti, to have the . . . for Vaiṣṇavas, they don't accept this sāyujya-mukti, to merge into the existence of the Lord. They accept sārūpya-mukti. Sārūpya-mukti means to have the same features of the body like Viṣṇu. In Vaikuṇṭhalokas all the living entities, devotees, they have got four hands.
And only in Kṛṣṇaloka, Kṛṣṇa has got two hands and His devotees also have two hands. In other lokas, Vaikuṇṭhalokas . . . there are innumerable Vaikuṇṭha planets, Nārāyaṇa is the predominating Deity, Lakṣmī-Nārāyaṇa. And those who enter such planets, they get the same bodily feature, exactly looking like Nārāyaṇa.
You have seen the picture of the Viṣṇudūtas who came to deliver Ajāmila. They were exactly looking like Nārāyaṇa. The same helmets, the same ornaments, exactly. You can understand. Just like your president or queen, if you are also dressed, you'll also look like queen. Or if you are dressed, you'll look like the president. But that does not mean you are president or you are queen, simply by dressing.
Similarly, although the devotees and the living entities, they get the same feature of the body just like Nārāyaṇa, Viṣṇu, they're not viṣṇu-tattva. That is called sāyujya, sārūpya. Similarly, sālokya, to live in the same planet. Sāmīpya, to live nearby, near exactly with Nārāyaṇa. Just like we are living together, similarly, you can live with Nārāyaṇa, sāmīpya, side by side. These are the different kinds of liberation.