Upon the low practical value of so-called constructive criticism I can offer testimony out of my own experience. My books are commonly reviewed at great length, and many critics devote themselves to pointing out what they conceive to be my errors, both of fact and of taste. Well, I cannot recall a case in which any suggestion offered by a constructive critic has helped me in the slightest, or even actively interested me. Every such wet-nurse of letters has sought fatuously to make me write in a way differing from that in which the Lord God Almighty, in His infinite wisdom, impels me to write—that is, to make me write stuff which, coming from me, would be as false as an appearance of decency in a Congressman. All the benefits I have ever got from the critics of my work have come from the destructive variety. A hearty slating always does me good, particularly if it be well written. It begins by enlisting my professional respect; it ends by making me examine my ideas coldly in the privacy of my chamber. Not, of course, that I usually revise them, but I at least examine them. If I decide to hold fast to them, they are all the dearer to me thereafter, and I expound them with a new passion and plausibility. If, on the contrary, I discern holes in them, I shelve them in a _pianissimo_ manner, and set about hatching new ones to take their place. But constructive criticism irritates me. I do not object to being denounced, but I can’t abide being school-mastered, especially by men I regard as imbeciles.