This Mr.Chaffanbrass knows, and, like an actor who is kept up to his high mark by the necessity of maintaining his character, he never allows himself to grow dull over his work.

Therefore Mr.Chaffanbrass bullies when it is quite unnecessary that he should bully; it is a labour of love; and though he is now old, and stiff in his joints, though ease would be dear to him, though like a gladiator satiated with blood, he would as regards himself be so pleased to sheathe his sword, yet he never spares himself.

He never spares himself, and he never spares his victim.
As a lawyer, in the broad and high sense of the word, it may be presumed that Mr.Chaffanbrass knows little or nothing.

He has, indeed, no occasion for such knowledge.

His business is to perplex a witness and bamboozle a jury, and in doing that he is generally successful.