"What life is in that, to be the death of this marriage?" (act II scene ii)
Metaphor # 2
Sadness is without no limit.
"There is no measure in the occasion that breeds; therefore the sadness is without no limit" (act I scene iii)
Imagery # 1
Representation of all his bad emotions.
"I cannot hide what I am: I must be sad when I have cause, and smile at no man's jests; eat when I have stomach, and wait for no man's leisure; sleep when i am drowsy, and tend on no man's business; laugh when I am merry, and claw no man in his humour." (act I scene iii)
Imagery # 2
Cankers are annoyances just like him.
"I would rather be a canker in a hedge than a rose in his grace; and it better fits my blood to be disdained of all than to fashion a carriage to rod love from any: in this, though I cannot be said to be a flattering honest man, it must not be denied but I am a plain-dealing villain." (act I scene iii)