Jonathan Edwards 
Life of David Brainerd [PDF ebook] 
Missionary to the Indians; Chiefly Taken From His Own Diary and Other Private Writings

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. There is one thing, easily discernible in the life of brain erd, which by many may be considered an objection to the extraordinary evidences of his religion and devotion, viz. That he was, by his constitution and natural temper, so prone to melancholy and dejection of Spirit. There are some who think that all religion is a melancholy thing; and that what is called Christian experience is little else beside melancholy.