They are polar opposites; Macbeth is indecisive concerning the act of regicide despite it offering him the chance to realize his ambition, while Lady Macbeth is decisive and considers nothing except forcing her husband to realize his ambition.
Lady Macbeth reveals herself as another character aware of deception and its role in the world as she instructs Macbeth to ‘bear welcome in your eye but be the serpent under’t’ when Duncan arrives.
This does lessen some of the criticism towards Lady Macbeth as Macbeth has already shown himself to be able to deceive, as he presented himself as loyal to the king in the previous scene while still considering his ambition to be king, which would involve killing Duncan.
In the Elizabethan period children had great respect for their parents and did everything they were told to do ”My lips, two blushing pilgrims,” this indicates that Romeo wants to start a 'pilgrimage' or journey of love with Juliet and the 'blushing pilgrims' symbolise his initial embarrassment of kissing her with passion and his actual lips as well.
Hate, I think, triggers the events of love even though the two emotions are equal throughout the play.