Now a question arises: If the Lord is sitting in the hearts of nondevotees, why are they not moved to become devotees? It may be answered that the stubborn nondevotees are like the barren land or alkaline field, where no agricultural activities can be successful. As part and parcel of the Lord, every individual living entity has a minute quantity of independence, and by misuse of this minute independence, the nondevotees commit offense after offense, to both the Lord and His pure devotees engaged in missionary work. As a result of such acts, they become as barren as an alkaline field, where there is no strength to produce.
Reference:-SB 3.9.12