The literary device used in the sentence is a simile. Similies use the words: like or as.
You need to attach an image of the passage so I can read it.
Answer:
it means that that before u do anything it looks difficult and you dont wanna do it but later after you do that it isn't that hard.eg.Before u study about the grammar topic ,u think it would be hard and impossible to learn but later when u get the idea u will really know how it is.
