What is the friar laurance saying about the powers of natural plants and herbs?

Friar Laurence emphasizes the dual nature of natural plants and herbs, highlighting that they possess both healing properties and potential dangers. He suggests that these substances can be used for good, such as healing ailments, but can also lead to harm if misused. This reflects a broader theme in "Romeo and Juliet" about the balance between nature's gifts and their consequences. Ultimately, his perspective showcases the complexity of nature as a source of both life and death.