This republication of Colquhoun’s work should be welcomed as a wonderful instrument to recalibrate our theological and spiritual engines. It is well worthy of a place among the books that we “read, mark, learn, and inwardly digest” because it is so Scripture-concentrated, pastorally sensitive, and full of spiritual wisdom. Each of his publications marks him out as a man and minister of unusual gifts. —From the foreword by Sinclair Ferguson