Surah 9. Al-Tawba, Ayah 110

Lit., "unless their hearts are cut into many pieces" - i.e., until they die. In verses {109-110}, the reference to "the building which they have built" is, obviously, widened beyond the preceding allusion to houses of worship, and allegorically circumscribes here all the "works" and the behaviour of men.

"Their hearts cut to pieces" i.e., they meet their death. The parable is continued further. The heart of man is the seat of his hopes and fears, the foundation of his moral and spiritual life. If that foundation is on an undermined sand-cliff already crumbling to pieces, what security or stability can he have? He is being shaken by alarms and suspicions and superstitions, until like the edge of a sand-cliff they are cut clean away and fall into a heap of ruin and his spiritual life and all its land-marks are destroyed.