Through long immersion in a particular field of practice and inquiry, you become a connoisseur of a certain class of intellectual problems. You adopt the language of your subfield, but also a shared, usually inarticulate sense of what sort of problems are worth investigating: what to take seriously. In the course of this apprenticeship you make the characteristic mistakes of a novice, and suffer their humiliations before your teachers (who include the more advanced graduate students). Conversely, you experience elation at those moments when you feel a growing mastery—
