As rain penetrates a poorly roofed house, so passion penetrates the uncultivated mind.

The image of the poorly roofed house is perfect for describing the untrained mind. Ducchannaṃ — badly roofed, with gaps: such a house defends against fair weather but is defenseless against rain. A mind without practice (abhāvitaṃ — uncultivated, undeveloped) is equally unprotected against passions (rāga).

Rāga — passion, avid desire, attachment tinged with urgency — is not simply feeling attraction. It is that obsessive quality that converts taste into need, interest into compulsion, pleasure into dependency. An uncultivated mind cannot distinguish well between natural desire and parasitic rāga.

Bhāvanā — cultivation, development — is precisely the work of repairing the roof. Meditation does not eliminate passions by repression; it creates a mental structure solid enough that they do not govern. The practitioner does not stop feeling attraction; they simply cease being dragged by it.

The house metaphor also suggests that practice is maintenance work, not one-time construction. A well-repaired roof still needs periodic inspection. Mental stability is not conquered once; it is maintained with continuous practice.