"Just like Buddhists, they want nirvāṇa, extinction of this material conditional life. That is called nirvāṇa. And the Māyāvādī philosophers, impersonalists, they want not only extinction of these material pangs but they want to be situated in spiritual consciousness only. But our Vaiṣṇava philosophy is that you cannot keep yourself in spiritual consciousness unless you are fully engaged in spiritual activities. That is the perfect philosophy.

So Yamunācārya is praying to the Lord, "My dear Lord, when I shall achieve that stage of life when I shall be fully engaged in Your service?" Bhavantam evānucaran nirantaraḥ. Nirantaraḥ means without any interval. In the material world, after working for some time, we want an interval for rest. But if you are actually engaged in spiritual activities, you won't like to be rested. You want to continue always: work, work, work. Rest will be disgusting. Of course, so long we have got this material body, we have to take rest, but this rest is also not required, because in the spiritual world there is no such fatigue. Everyone is always active. So that is perfectional stage."

(Srila Prabhupada Lecture—London, September 14, 1969)