| The author of the article, Jonathan Gottfried, presents a tutorial on building an application that sends and receives SMS messages using Google Glass, Twilio, Ruby, and Sinatra. The application uses the Mirror API to interact with the user's Glass device and Twilio to send and receive SMS messages. The author provides a step-by-step guide on how to set up the application, including configuring the Google and Twilio APIs, setting up a database to store OAuth credentials and phone numbers, and writing routes for authentication and SMS handling. The application is designed to allow users to receive SMS messages on their Glass device and respond with voice commands or text messages. The author also provides links to additional resources, including a scaffold project called GlassRails, which can be used as a starting point for more complex applications.