In 1981 John D. Callahan founded a "Christian Newsletter" at JPL, with the help of Christian leaders there such as Johnie Driver, Olen Adams, and Billie Worswick (Billie also contributed much to the newsletter). Throughout the decade, John wrote a number articles for the newsletter, which are given below, grouped by year.
THE IMPORTANCE OF PRAYER (Dec 1981), THOUGHTS ON WITNESSING (Feb 1982), WHERE THE PROBLEM BEGINS (Mar 1982), WHO WAS JESUS? (May 1982), FAITH AND THE WILL OF GOD (June 1982), SEVEN FACTS EVERYONE CAN AGREE UPON ABOUT JESUS (Aug 1982), LOVE ONE ANOTHER (Sep 1982), WHAT JESUS SAID ABOUT HIMSELF (Oct 1982), WHY DO WE SUFFER? (Nov 1982)
THE REALITY OF JESUS (June 1983), PRAYER AND THE WILL OF GOD (Aug 1983), CHRISTMAS BEGINS WITH . . . (Dec 1983), OUR GREAT ADVERSARY (June/July 1984), YOUR IMPORTANCE TO THE BODY (Sept 1984), WHAT DOES BORN AGAIN MEAN? (Mar 1985), GOD'S PLAN FOR YOUR LIFE (Nov 1985)
WHO EVER BATTED 1000? (Feb 1986), THE HOLY SPIRIT AND YOU (Mar 1986), WORK, FOR THE NIGHT IS COMING (May 1986), IF AT FIRST YOU DON'T SUCCEED (July 1986), JESUS COMPARED? (Sept 1986), DON'T BE BOUND BY THE PAST (Oct 1986), THE MEANING OF CHRISTMAS (Dec 1986)
GOD'S DESIGNED UNIVERSE (Jan 1987), WHAT WILL YOU VALUE WHEN YOU DIE? (Feb 1987), DON'T GET AHEAD OF GOD (April 1987), SMOKED OUT? (June 1987), THE MEANING OF THE MIRACULOUS (July 1987), GOD OR MAMMON? THE NEED FOR DEDICATION (Aug 1987), GOD AND THE UNIVERSE (Fall 1987), MY CHRISTMAS STORY (Winter 1987), SMALL GROUPS (Spring 1989)