Originally titled Heartwork, this is a strong exhortation to all the saints of God to vigilantly protect, defend, and purify hearts from the assaults of this world. It first appeared as articles in the July through December 1933 issues of Pink’s monthly journal Studies in the Scriptures, which was published without interruption from 1922 to 1953. Each issue of the Studies normally included six to eight articles; each article addressed a different topic or book of Scripture, which ran as a series over several issues (sometimes as long as several years). Sustaining single-handedly this volume of in-depth Bibical exposition over his lifetime is a testimony to the grace of God upon his labors. Chapel Library is reprinting the original editions of the Studies in the Scriptures, sending three monthly issues by mail each quarter in the USA.