人类生存的秘密不仅是拥有生命，而且是有理由生活的理由。对生活目的没有清楚的人的人，即使他被一堆面包包围，也会摧毁自己而不是留在这个世界上，他也宁愿放弃它。
(The secret of human existence is not only to possess life, but also to have a reason to live. The man who does not have a clear idea of the purpose of life will prefer to give it up even if he is surrounded by piles of bread and will destroy himself rather than remain in this world.)