To use language vividly, your textbook recommends that speakers employ:

Imagery and rhythm are two good techniques that can be employed when trying to engage one's listeners. This way, the speaker can have a topic that becomes more interesting and "paints a picture" in the mind of the listeners, giving them a more accurate sense of the topic that the speaker is trying to deliver.

It is meant that like tapestry scientific theories often need to pull out since they are not relevant and often times the whole chain of theories may be pulled out.