Answer:
The quote means that everything serves a purpose and that you shouldn't be afraid.
Step-by-step explanation:
This quote is taken from "A Day in the Country" by Anton Chekhov. The little orphan is scared of the oncoming storm. While trying to comfort her, the other character says this line. He explains that the rain is as necessary for the tress as bread (or any other food) is for us. He continues to explain that while the thunder and lightening may be scary that they will not do any harm to the orphan. Once the storm has passed, everything will go back to the way it was before.