In our hunger for guidance, we were ordinary. The American Freshman Survey, which has followed students since 1966, proves the point. One prompt in the questionnaire asks entering freshmen about “objectives considered to be essential or very important.” In 1967, 86 percent of respondents checked “developing a meaningful philosophy of life,” more than double the number who said “being very well off financially.”

Naturally, students looked to professors for moral and worldly understanding. Since then, though, finding meaning and making money have traded places. The first has plummeted to 45 percent; the second has soared to 82 percent.

I returned to U.C.L.A. on a mild afternoon in February and found the hallways quiet and dim. Dozens of 20-year-olds strolled and chattered on the quad outside, but in the English department, only one in eight doors was open, and barely a half dozen of the department’s 1,400 majors waited for a chance to speak.

When college is more about career than ideas, when paycheck matters more than wisdom, the role of professors changes. We may be 50-year-olds at the front of the room with decades of reading, writing, travel, archives or labs under our belts, with 80 courses taught, but students don’t lie in bed mulling over what we said. They have no urge to become disciples.

Sadly, professors pressed for research time don’t want them, either. As a result, most undergraduates never know that stage of development when a learned mind enthralled them and they progressed toward a fuller identity through admiration of and struggle with a role model.

Since the early 2000s, I have made students visit my office every other week with a rough draft of an essay. We appraise and revise the prose, sentence by sentence. I ask for a clearer idea or a better verb; I circle a misplaced modifier and wait as they make the fix.

As I wait, I sympathize: So many things distract them — the gym, text messages, rush week — and often campus culture treats them as customers, not pupils. Student evaluations and ratemyprofessor.com paint us as service providers. Years ago at Emory University, where I work, a campus-life dean addressed new students with a terrible message: Don’t go too far into coursework — there’s so much more to do here! And yet, I find, my writing sessions help diminish those distractions, and by the third meeting students have a new attitude. This is a teacher who rejects my worst and esteems my best thoughts and words, they say to themselves.

You can’t become a moral authority if you rarely challenge students in class and engage them beyond it. If we professors do not do that, the course is not an induction of eager minds into an enlarging vision. It is a requirement to fulfill. Only our assistance with assignments matters. When it comes to students, we shall have only one authority: the grades we give. We become not a fearsome mind or a moral light, a role model or inspiration. We become accreditors.