So-called mayavadis and impersonalists consider Lord to be formless and therefore they avoids everything. Such type of renunciation is called as artificial renunciation. And because they have already given up on everything without experiencing any higher taste, their mind remains somewhat agitated. This is why after sometime, they again falls down into the material pool. They come and open hospitals and schools. So, if everything is false, why coming again to open schools and hospitals? Whereas on the other side, a devotee of Lord Krishna, doesn't not renounce on anything but rather spiritualize it. An impersonalist cannot offer good eatables to Lord as He considers Lord to be formless and so Lord cannot eat. But a devotee is aware of the highest truth and therefore he offers all nice eatables to the Supreme Lord and then honour it as prasadam. So a devotee know how to use everything for the service of Kṛṣṇa. This is Real Renunciation. Accepting everything that is favourable to Kṛṣṇa and rejecting everything that is unfavourable to Kṛṣṇa. This is why, Kṛṣṇa Consciousness is the topmost Consciousness because it deals with Real Renunciation.
