Just 40 minutes makes a difference - 40- Minute Bible Studies without homework! . . . How Do You Know God's Your Father? - by Kay Arthur with David and B.J. Lawson - (6- week study) - This six-week study looks at the change that takes place when a mortal man encounters a holy God. The student will walk through the book of 1 John, taking note of the characteristics of a child of God versus those of a child of the devil. Softcover book. Chinese language-Traditional. Note: Difference between Simplified and Traditional: While The People's Republic of China and Singapore use the simplified system of writing Chinese characters, Taiwan, Hong Kong, and Macao still use the traditional system. It is wise to check user's personal preference.