Through an exegetic reading of Peirce's minor texts on higher education, I find that Peirce's conception of a "Liberal Education" is close to the Herbartian conception of "Bildung." Peirce calls for a general education with the ambition of qualifying critical thinkers with the capacity to go beyond the strict rules and narrow borders of the "artes liberales,"--the different subject matters or sciences taught at a university. Thus, Peirce's conception of a liberal education is closely linked to his interpretation of "common sense"--or "sensis communis"--as a "critical commonsensism." To him, it is urgent to educate and nurture "the first rule of reason," described as a will to learn, a curiosity, a dissatisfaction of what you already incline to think, and an intense desire to find things out. The nurturing of this "first rule of reason" is thus about educating an intellectual community of critical thinkers who are able to question authoritative beliefs, knowing how to debunk them, and how to turn away from "obiter dictum."