Metaphor is a figure of speech in which a word or phrase is applied to an object to which it is not literally applicable. Metaphor is used to make comparison between two objects that are not alike but which have something in common.
In the excerpt given above, Patrick Henry is comparing experience to lamp. Although experience is not a lamp. Patrick is describing experience as a lamp which gives light and he is capable of directing him about which direction to take. This sentence is an example of the use of metaphor because Patrick is attributing to experience the ability which it is not literally applicable.
