Summarize Friar Laurence's speech

Friar Lawrence is musing about the healing and harming properties of plants. He links them to the natural and metaphysical world. The natures of good and evil often create fire and heat. This speech foreshadows the sleeping potion that he will give to Juliet. It is a potion that has the potential to heal or harm the young lover's dream to be together. The speech suggests the combustible nature of intense love when it is under pressure.