Within the infant rind of this weak flower, Poison hath residence and medicine power. (2.3.23-24)
I have been feasting with mine enemy. (2.3.52)
Setting: Friar Lawrence's Cell
Oh Romeo, Romeo, wherefore art thou Romeo? Deny thy father and refuse thy name, Or, if thou wilt not, be but sworn my love, And I'll no longer be a Capulet. (2.2.36-39)
Though this scene does not display any opposing forces between any characters or any major rivals, these two lines do tell us that this and other simple plants is able to both kill and heal. This shows the motif "Opposing Forces" because to kill and to heal are opposing factors, and this one thing is able to do both contradicts with itself.
Feasting is usually associated with fun and happiness as well as friendly attitudes and plentiful of food. In this sentence, Romeo also says "mine enemy." One does not really have a fun and good dinner with their enemies. Romeo uses sort of an Oxymoron to say that he knows he had a good time with this person and he knows he shouldn't since this person is his enemy and therefore should be avoided.
Juliet is speaking about their family grudge and how even thought they loved each other, their love is forbidden due to their names and the association of their names to their respective families. This shows opposing forces because their opposing families are in their way of their love.