Melville Fuller,
Starr v. United States (153 U.S. 614…
“ As the jurors are the triors of facts, expressions of opinion by the court should be so guarded as to leave the jury free in the exercise of their own judgments. They should be made distinctly to understand that the instruction is not given as to a point of law by which they are to be governed, but as a mere opinion as to the facts, to which they should give no more weight than it was entitled to. ”
