Just as iron rusts from disuse, even so does inaction spoil the intellect.

Iron rusts from disuse; water loses its purity from stagnation ... even so does inaction sap the vigour of the mind.

Iron rusts from disuse, stagnant water loses its purity and in cold weather becomes frozen; so does inaction sap the vigors of the mind.

Iron rusts from disuse; water loses its purity from stagnation... even so does inaction sap the vigor of the mind.

Iron rusts from disuse, stagnant water loses its purity, and in cold weather becomes frozen, even so does inaction sap the vigors of the mind.

Every action needs to be prompted by a motive.