[The] saint's duty and exercise; or, an earnest invitation to the throne of grace. Wherein is laid down some quickening Motives for the stirring up of Sinners, both to Family and secret Prayer, with Dirrections how to pray and give Thanks to God in Publick and Private; and some Encouragements to servent hearty Prayer: Together with the great Danger of living in the neglect of so necessary a Duty. By Robert Russel of Wedhurst in Sussex.