Read the second stanza from "Mutability.”

We rest.—A dream has power to poison sleep;
We rise.—One wandering thought pollutes the day;
We feel, conceive or reason, laugh or weep;
Embrace fond woe, or cast our cares away

What is the effect of the words poison and pollutes in this stanza?

They emphasize the idea that thoughts can have negative effects.
They illustrate the negative effects of not getting enough sleep.
They show that negative thoughts alone are able to destroy one’s life.
They suggest that human beings tend to be inherently negative.