This short but helpful book is a must for all Christians who want to walk in a manner worthy of Jesus Christ, pleasing Him in all things. Pink aptly uses Proverbs 4:23 to show that keeping or guarding the heart is key to walking in that worthy manner. For from the heart, are all "the issues of life." As goes the heart, so goes the life. Whether you are a young or old Christian, or whether you live in prosperity or in adversity, this is a superb guide to practical Christian thinking and living.