生命太短暂，不能活在别人的梦想里。

外交的目标是通过对话和合作解决争端，并推动可持续的和平发展。

The deepest problems in mathematics often arise from the simplest questions.

The past does not equal the future.

沉默从来不是空的；它充满了可能性。

There are things that happen and leave no discernible trace, are not spoken or written of, though it would be very wrong to say that subsequent events go on indifferently, all the same, as though such things had never been.

自然选择是残酷的。

解释：上等的医生能够医治国家，次一等的只会医治病人，这本来就是医生的职守。