This domain is an island and enclosed by nature itself within limits that can never be altered. It is the country of truth (a very charming name), but surrounded by a wide and stormy ocean, the true home of illusion, where many a fogbank and fast-melting ice-floe tempts us to believe in new lands, while constantly deceiving the adventurous mariner with vain hopes, and involving him in adventures which he can never abandon and yet can never bring to an end.

- Immanuel Kant, "Critique of Pure Reason"
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这片土地是一个岛屿，它本身被大自然包围在不可改变的疆界中。这就是真理之乡（一个诱人的称号），周围是一片广阔而汹涌的海洋、亦即幻相的大本营，其中好些海市蜃楼、好些即将融化的冰山都谎称是新大陆，在不停地以空幻的希望诱骗着东奔西闯的航海家去作出种种发现，将他卷入那永远无法放弃、但也永远不能抵达目的之冒险。
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-康德，《纯粹理性批判》