I have been reminded that I sit here as counsel for the defendant. I certainly do so, so far as to interpose between him and the counsel for the prosecution, and to see that no improper use of the law is made against him, and that no improper evidence is given to the jury: but the Judge has another task to perform, which is that of assisting the jury in the administration of justice.

Wakefield's Case (1799), 27 How. St. Tr. 736.