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If there are any two words in Persian that President Obama should learn, they are "maslahat" and "aberu." Maslahat is often translated as expediency, or self-interest. Aberu means face — as in, saving face. In the nearly 34 years since the Islamic revolution in Iran, expediency has been a pillar of decision making, but within a framework that has allowed Iranian leaders to save face. If there is to be any resolution of the nuclear standoff, Western leaders must grasp these concepts.