Must explain to you how all this mistaken idea denouncing pleasure praising pain was born and I will give you a complete account of the system, expound the actual teachings of the great explorer of the truth, the master-builder of human happiness do not know how to pursue. Nor again is there anyone who loves or pursues or desires to obtain pain of itself, because it pain, but because occasionally circumstances occur which toil and pain can procure him some great pleasure. To take a trivial example, which of us ever undertakes laborious physical exercise.