The document discusses Henry David Thoreau's views on necessary and unnecessary influences through quotes from his writings. It presents quotes critiquing influences like insincerity, rigidity, extravagance, technology controlling lives, conformity, expansionism, unawareness of the world, judging others, distracting travel, belligerence, and not learning from life. It then pairs each critique with a matching quote advocating influences like sincerity, flexibility, simplicity, controlling creations, nonconformity, frugality, knowledge of the world, equality, changing one's soul, pacifism, and learning from life. The document concludes with a lengthy list of citations for the images presented.