An essay on the nature and glory of the Gospel of Jesus Christ : as also on the nature and consequences of spiritual blindness: and the nature and effects of Divine illumination. Designed as a supplement to the author's letters and dialogues on the nature of love to God, faith in Christ, and assurance of a title to eternal life. By Joseph Bellamy, A.M. Minister of the Gospel at Bethlem, in New-England. [Five lines of Scripture text].