A fountain sealed: or, The duty of the sealed to the Spirit, and the worke of the Spirit in sealing. Wherein many things are handled about the Holy Spirit, and grieving of it: as also of assurance and sealing what it is, the priviledges and degrees of it, with the signes to discerne, and means to preserve it. : Being the substance of divers sermons preached at Grayes Inne. / By that Reverend Divine, Richard Sibbes D.D. and sometimes preacher to that honourable society.