The most popular class at Yale University is called “Life Worth Living” and is taught by Miroslav Volf, Matthew Croasmun, and Ryan McAnnally-Linz. The overwhelmingly positive reviews of the class might seem surprising, given that it could upend a student’s life direction (or at least the selection of a major — although one student did complain in an online review that he was disappointed the course didn’t include “more on yachts.” “Life Worth Living: A Guide to What Matters Most” (The Open Field) is the newly released book version of the class, an exploration that includes myriad sages and seers...