Srila Prabhupada – The test is that spiritual advancement means minimizing material activities. Bhaktiḥ pareśānubhavo viraktir anyatra syāt (SB 11.2.42). Automatically they will be detestful for material engagement. Spiritual advancement means that.

Just like a hungry man, if you give him to eat, as soon as he begins to eat, immediately he’ll feel satisfaction, and when he is fully fed, he’ll say: “No, I don’t want any more.” So similarly, spiritual advancement means proportionately one should be detestful to material engagement . That is the test.

So if anyone is advancing by meditation or bhakti-yoga or Kṛṣṇa consciousness, one has to give evidence that he is now being proportionately detached from this material engagement. That is the test. This is not for only the meditators, it is for you also. How far you are advancing in Kṛṣṇa consciousness you test yourself—how far you have become detached from material consciousness. That’s all.

(Lecture- Los Angeles, 20th Dec 1968)