If there be anything that can be called genius, it consists chiefly in ability to give that attention to a subject which keeps it steadily in the mind, till we have surveyed it accurately on all sides.
如果有什么东西可以被称为天才的话，那就是把注意力集中在一件事上的能力。这件事能使我们把它牢牢地记在心里，直到我们从各个方面对它进行了准确的考察。