Sir John W. Salmond, Jurisprudence (1913)
“ There is no generic term which is the correlative of right in the wide sense, and includes all the burdens imposed by the law, as a right includes all the benefits conferred by it. These legal burdens are of three kinds, being either Duties, Disabilities, or Liabilities. A duty is the absence of liberty; a disability is the absence of power; a liability is the presence either of liberty or of power vested in some one else as against the person liable. ”
