The security dilemma is a fundamental feature of international politics, as states' efforts to increase their own security often decrease the security of others.

解释：苦味食物走骨，骨病的人不宜多食，体现了中医五味与五脏的关系。

人心比万物都诡诈，坏到极处，谁能识透呢？

A man, as a general rule, owes very little to what he is born with – a man is what he makes of himself.