Evil is a disease; and worry over disease is itself an additional form of disease, which only adds to the original complaint.
The prevalent fear of poverty among the educated classes is the worst moral disease from which our civilization suffers.
Truth happens to an idea
If any organism fails to fulfill its potentialities, it becomes sick.
I wished by treating Psychology like a natural science, to help her become one.
A Beethoven string-quartet is truly, as some one has said, a scraping of horses' tails on cats' bowels, and may be exhaustively described in such terms; but the application of this description in no way precludes the simultaneous applicability of an entirely different description.