"The Devil, can sometimes do a very gentlemanly thing"

This quote by Robert Louis Stevenson suggests that even the Devil, who is typically viewed as a destructive and wicked figure, can in some cases do something that is considered to be gentlemanly. This might imply that the Devil can be capable of doing something that is kind and generous, or that he can act in a polite and considerate way. It could also suggest that the Devil can be capable of doing something that is ethically right, even if it breaks his own interests. This quote suggests that the Devil is not constantly as bad as he is constructed to be, and that he can in some cases do something that is helpful to others. It likewise suggests that even the most evil of people can in some cases do something that is excellent and kind.