In Beard v. United States, 158 U.S. 550, 563 (1895), it was said: "In our opinion, the court below erred in holding that the accused, while on his premises, outside of his dwelling-house, was under a legal duty to get out of the way, if he could, of his assailant, who, according to one view of the evidence, had threatened to kill the defendant, in execution of that purpose had armed himself with a deadly weapon, with that weapon concealed upon his person went to the defendant's premises, despite the warning of the latter to keep away, and by word and act indicated his purpose to attack the accused. The defendant was where he had a right to be, when the deceased advanced upon him in a threatening manner, and with a deadly weapon; and if the accused did not provoke the assault and had at the time reasonable grounds to believe, and in good faith believed, that the deceased intended to take his life or to do him great bodily harm, he was not obliged to retreat, nor to consider whether he could safely retreat, but was entitled to stand his ground and meet any attack made upon him with a deadly weapon, in such way and with such force as, under all the circumstances, he, at the moment, honestly believed, and had reasonable grounds to believe, was necessary to save his own life or to protect himself from great bodily injury."