Tears shall drown the wind

"Shall blow the horrid deed in every eye,

That tears shall drown the wind."

This quote is from Macbeth it means that everyone is going to be sad if the king does get killed and all of there tears will fill the air and the wind will be their tears.

The purpose of a soliloquy is so no one else in the play can hear your most inner thoughts only the audience can.

Trying to kill the king

Dramatic Irony is when the audience knows what is going to happen but the people in the play don't know. Macbeth is plotting to kill the king, this is Dramatic Irony because we the audience already knows that Macbeth plans to kill the king but king duncan doesn't know this no one in the play does the only thing making Macbeth wait to kill him is that he is waiting for the perfect opportunity.