1. The trash of material contamination

    Material desires in the mind are the trash of material contamination. By such contamination, the living being is faced with so many compatible and incompatible things that discourage the very existence of spiritual identity. Birth after birth the conditioned soul is entrapped with so many pleasing and displeasing elements, which are all false and temporary. They accumulate due to our reactions to material desires, but when we get in touch with the transcendental Lord in His variegated energies by devotional service, the naked forms of all material desires become manifest, and the intelligence of the living being is pacified in its true color.

    From Srila Prabhupada's purport to SB 1.15.29