
Colour http://books.google.com/books?id=JHguFYrTEQ0C&q=%22It+is+said+of+money+that+it+is+more+easily+made+than+kept+and+this+is+true+of+many+things+such+as+friendship+and+even+life+itself+is+more+easily+got+than+kept%22&pg=PA141#v=onepage
Often paraphrased as "Friendship is like money, easier made than kept."
The Note-Books of Samuel Butler (1912), Part IX - A Painter's Views on Painting