Neither have I any reason for loving my teacher, if he has regarded me merely as one of the mass of his scholars, and has not thought me worthy of taking especial pains with by myself, if he has never fixed his attention upon me, and if when he discharged his knowledge on the public, I might be said rather to have picked it up than to have learnt it from him. What then is our reason for owing them much? It is, not that what they have sold us is worth more than we paid for it, but that they have given something to us personally. Suppose that my physician has spent more consideration upon my case than was professionally necessary; that it was for me, not for his own credit, that he feared: that he was not satisfied with pointing out remedies, but himself applied them, that he sat by my bedside among my anxious friends, and came to see me at the crises of my disorder; that no service was too troublesome or too disgusting for him to perform; that he did not hear my groans unmoved; that among the numbers who called for him I was his favourite case; and that he gave the others only so much time as his care of my health permitted him: I should feel obliged to such a man not as to a physician, but as to a friend.