In capitalism, when John buys a toy plane his money is injected back into the economy, this means that John's money will end up being used to pay the employees' wages and to pay taxes. In other words, <u>buying</u> is necessary in this economic system, if people didn't buy stuff then no one could be paid and the government wouldn't get money either.
i think it is "The bread and wine do not change – they stay as bread and wine ... but Christ is 'really present' in the bread and wine, in a spiritual way."