Such a crises occurs only where the ever-lengthening chain of payments,
and an artificial system of settling them, has been fully
developed. Whenever there is a general and extensive disturbance
of this mechanism, no matter what its cause, money becomes
suddenly and immediately transformed from its merely ideal shape
of money of account into hard cash. Profane commodities can no
longer replace it. The use-value of commodities becomes
valueless, and their value vanishes in the presence of its own
independent form. On the eve of the crisis, the bourgeois, with
the self-sufficiency that springs from intoxicating prosperity,
declares money to be a vain imagination. Commodities alone are
money. But now the cry is everywhere that money alone is a
commodity! As the hart pants after fresh water, so pants his soul
after money, the only wealth.