Due to five impurities, gold is not malleable, doesn’t shine, and is unsuitable for making into ornaments. What five? Iron, copper, lead, tin, and silver.

Due to five impurities, the mind is not malleable, does not shine, and not concentrated for the destruction of the corruptions. What five? Corrupted by sensual desire, ill-will, sloth and torpor, restlessness, and doubt. S.v.91.