Answer:
Your quote is a simile.
Step-by-step explanation:
What is a simile?
A simile consists of the use of words, like or as to compare objects. Ex: She was slow as a turtle. That would be a simile because it uses as to connect two things, the girl and a turtle, in order to make a comparison.
"I must live to run as slow as a snail" is a simile because it uses as to compare the narrator to moving at the speed of a snail.