"Knowledge always desires increase: it is like fire, which must first be kindled by some external agent, but which will afterwards propagate itself." --Samuel Johnson
Which rhetorical device is used in the sentence?
A) Allusion
B) Analogy
C) Oxymoron
D) Parallelism
An anology is used when you compare ine thing to another, in this case the author relates Knowledge and fire, and he then explains why he thinks they´re alike.