在我们推理关于事实的过程中，有各种可能的确证程度，从最高的确定性到最低级别的道德证据。

一本好书的标准在于它能让读者感到不安的程度。

There are tracts in my life that are bare and silent. They are the open spaces where my busy days had their light and air.

心理过程是生活的工具，其价值在于它们的用途。