Some of us may never contemplate using a statistic in our message, others are drawn to them in every introduction they write. Statistics can be effective, or they can be totally counter-productive. I was just reading some advice on the use of statistics (not a preaching or Christian source, but helpful nonetheless). He suggested you decide whether the statistic is being used to add credibility or to be memorable (a statistic will not do both unless it is stated specifically and then restated in relevant terms that can be remembered). So here is James Humes advice in three points:
1. Reduce the number of statistics. It is better to use one than to use several. Pick the best one and then communicate it effectively. To use two or more will only confuse and undermine your goal.
2. Round the numbers in the statistics. Sometimes you will want to stay specific (to add credibility), but for a memorable stat, round the number. (More than 25,000 is better than saying 26,315.)
3. Relate the statistic to the listeners. Numbers are hard to visualize, so restate your stat in terms they will understand (so many thousands of square miles is better stated as “about the size of …” an area they know, or so many millions of dollars is better stated as “dollar bills placed end to end, this would stretch from Seattle to Miami, or whatever).
Often statistics are of minimal value in preaching, but sometimes an arresting or startling statistic will help in setting up a message or a point in a message. Be sure to use that stat wisely. And one piece of advice that should be added for us as preachers of truth – be truthful, don’t twist, don’t falsify, don’t lie. Integrity matters.