Today many students can capture a concept more easily visually than through the written word. The use of an appealing visual aid can clarify truth, but such aids should not be used to entertain or draw attention to oneself. An effective visual aid is like a hook in the mind to which truths could be carefully secured so that it can be understood, remembered, and used in time of need. Such aids should be conditioned to the age of the student. They may need to be understood in the context of his environment. Jesus is a master at the use of such visual aids-- grain of mustard, a child, a millstone, a roman coin. He forever confirmed their power.