Janua coelestis. or, The mystery of the Gospel in the salvation of a sinner, opened and explained : wherein the nature of the Gospel-salvation is stated, the possibility of the sinner's being saved is evinced, the terms of the Gospel-covenant are ascertained and cleared, the importance of salvation is illustrated, and the great concern of every soul is excited and enforced: in several discourses on Acts xvi. 30. /