If there is even “a pinch” (Srila Prabhupada’s expression) of material desire, one cannot attain the spiritual world. Here’s what Srila Prabhupada said about this in LA on 26 May 1972: “This is significant. Those who are Krsna conscious, they have no material desires. Finished. Brahmany upasamasrayam. Upasama, upasama means completely finished, don’t want. They can worship the Supreme Personality of Godhead.
Otherwise, without being akama ... Akama means no material desires. Anyabhilasita-sunyam [BRS.1.1.11], completely. If we have got least desire for material enjoyment, Krsna will give us chance again to accept a body which will satisfy the senses.” This was said at the beginning of lecture on the Srimad Bhagavatam verse, 2.3.9, which translates as follows: “One who desires domination over a kingdom or an empire should worship the Manus. One who desires victory over an enemy should worship the demons, and one who desires sense gratification should worship the moon. But one who desires nothing of material enjoyment should worship the Supreme Personality of Godhead.” In this translation, rendered by Srila Prabhupada, the last sentence is significant to this thought. It’s brilliant.