Marketing involves figuring out the value of your service, product or idea and communicating that to potential customers who will ideally be convinced to purchase it. In the pre-technology days, this would involve methods such as posters, billboards, newspaper ads and so on. In the modern era, marketing has expanded to the internet through laptops, personal computers and smartphones. While the methods of marketing are involving, some of the basic principles remain the same. Theses quotes provide some valuable and timeless insights.