Cursing is invoking the assistance of a spirit to help you inflict suffering. Swearing on the other hand, is invoking, only the witness of a spirit to an statement you wish to make.
John RuskinThere is hardly anything in the world that some man cannot make a little worse and sell a little cheaper, and the people who consider price only are this man's lawful prey.
John RuskinYou talk of the scythe of Time, and the tooth of Time: I tell you, Time is scytheless and toothless; it is we who gnaw like the worm - we who smite like the scythe. It is ourselves who abolish - ourselves who consume: we are the mildew, and the flame.
John Ruskin