As you're explaining a Gospel principle that you really want others to come to know for themselves, pull out a piece of fruit, such as an apple, and begin eating it while you're in the midst of your discussion. Continue your discussion as you normally would. Stop occassionally and tell the others how delicious the fruit you're eating is! Then continue again with your discussion. After stopping and telling the others about your delicious fruit several times, ask if someone else would like to try the fruit also. Have someone else try the fruit. After they agree that the fruit IS delicious, make the following point: As you have just demonstrated, you can tell others how "delicious" the Gospel (or a particular Gospel principle) is, and they can believe you ...trusting in your testimony of it. But, they will never truly know and understand "how delicious it is," until they taste it for themselves.