Who said oh the things they will bump oh the things they will hit?

The phrase "Oh, the things they will bump, oh, the things they will hit" is from the children's book "Oh, the Places You'll Go!" by Dr. Seuss. This book, published in 1990, explores themes of adventure, challenges, and the journey of life. Dr. Seuss, known for his whimsical rhymes and imaginative characters, encourages readers to embrace their paths and experiences.