This essay explores ethical foundations for meeting the digital challenge via a case study of the work, life, and virtues of the greatest mathematician and natural scientist of the eighteenth century, Leonhard Euler. By biography and history one can learn of the gifts of human strength, practices, good will, dependence on others, and friendships which made possible Euler’s own astonishing corpus of work and that of many other scientists, mathematicians, engineers, and technologists. Digital technology results from a combination of science (...) (demonstrable knowledge and method), technology, engineering, and art (forms and artifacts of making and expressing), and mathematics (abstract numerical, algebraic, geometrical, formal, and digital concepts, rules, representations, and logics). Joint reflection on the biographical, historical, and natural sources of mathematics and the digital is essential for any humanization or ascesis in response to the perils and promises of digital technology for human thriving. As ethics enable and embody an ethos, so technologies are means and manifestations of a telos. Thus, thought and action for thriving through the digital needs to contemplate and conciliate the ends of humans and of the digital. (shrink)