Lifes preservative against self-killing. Or, An useful treatise concerning life and self-murder shewing the kindes, and meanes of them both: the excellency and preservation of the former: the evill, and prevention of the latter. Containing the resolution of manifold cases, and questions concerning that subject; with plentifull variety of necessary and usefull observations, and practicall directions, needfull for all Christians. By John Sym minister of Leigh in Essex.