Beginning with Hebrews 2:1 has his basis Dr William S Plumer reminds the reader that the "heed" consists of having these things constantly in mind, remembering them, firmly believing them, highly prizing them and honestly practising them.
In his foreword he writes "the heed we give to gospel matter is not merely sometimes, but at all times; not occasionally but continually.
This is why this volume was written - along with "The Bible True" and "Infidelity Wicked."