What is the purpose of friar laurence soliloquy at the beginning of the section

In Act 2, scene 3 from "Romeo and Juliet," by William Shakespeare, Friar Lawrence's soliloquy makes reference to the healing effectiveness of herbs and medicinal plants, at the same time they can be poisonous. As a consequence, he suggests that good qualities in nature and in people can lead to destruction if not used in the exact manner. Thus, he foreshadows the tragic death of the lovers.

he has become more humble and patient in battle.

to me i think class room sitting education is better. i do online school and i have not learned a think haha. when i sit in the classroom i just sit there and kind of pay attention but still i get so far ahead in the class when im doing online i have nothing else better to do but play video games and i sit in school and learn and have friends and just actually learn. when i'm doing online i sit here listing to music and get on and and look up the answers i guess that is my fault for being a cheater. but to be honest i think sitting in the classroom is better.