Bhaktivinoda Ṭhākura also says the same thing: anitya saṁsāre moha janamiyā jīvake karaye gāḍha (Vidyāra Vilāse 3). The so-called scientific improvement means he's already an ass, and he's becoming more, better ass. That's all. Nothing more. He's already an ass because he's part and parcel of Kṛṣṇa, and he has come to this material world to enjoy. That is ass mentality. There is no enjoyment. So he's already an ass. And this scientific improvement means he's becoming more attached to this material world to remain better ass. That's all. Avidyā . . . anitya saṁsāre. Anitya. He cannot stay here.
Suppose, working very hard like an ass, he gets a skyscraper building, throughout his whole life laboring. But he cannot stay there. He'll be kicked out. Is it not ass? Is he not an ass? He cannot stay there. Anitya saṁsāre. Anitya. Because it is not the permanent settlement. You are trying: dum-dum, very strong foundation. That's all right. But your foundation is nothing. You'll be kicked out.