Transcendentalism was a philosophical movement that held its ground in America for a good half a century. As the believers of this movement were against organised religion and believed that knowledge can be gained with the power of contemplating about the spirit and soul. The transcendentalists were against all kinds of social evils and unjust attitudes that prevailed in the American society at that time. Similarly the problem of slavery and woman emancipation for example greatly irked them. Because transcendentalism found its place only in literature and became a literary movement, the followers of this movement could not really solve the problems but they did voice them in their work, hoping it will open people's eyes.
4. It sets a tone of disdain for the enemy and how fed up Kennedy was with the war at that time.
6. The questions are meant to flare up a feeling of patriotism in the crowd. It's asking the Americans to stand up for their country.
8. He's explaining that if Americans are selfish and don't try to help their country and people that are less fortunate then them then nobody will be saved.
Hera's orchard, also known as The Garden of Hesperides, has many magical apple trees in its fields. These apple trees provide golden apples with special magical properties.