It seemed to me above all necessary to know what Jesus had in view when he cited these words which are not to be found in the law. I asked myself what these words could mean. In all other references of the sort, Jesus quotes a single rule from the ancient law: "Thou shalt not kill"--"Thou shalt not commit adultery"--"Thou shalt not forswear thyself"--"An eye for an eye, a tooth for a tooth"--and with regard to each rule he propounds his own doctrine. In the instance under consideration, he cites two contrasting rules: "_Ye have heard that it hath been said, Thou shalt love thy neighbor and hate thine enemy_,"--from which it would appear that the contrast between these two rules of the ancient law, relative to one's neighbor and one's enemy, should be the basis of the new law. To understand clearly what this contrast was, I sought for the meanings of the words "neighbor" and "enemy," as used in the Gospel text. After consulting dictionaries and Biblical texts, I was convinced that "neighbor" in the Hebrew language meant, invariably and exclusively, a Hebrew. We find the same meaning expressed in the Gospel parable of the Samaritan. From the inquiry of the Jewish scribe (Luke x. 29), "_And who is my neighbor?_" it is plain that he did not regard the Samaritan as such. The word "neighbor" is used with the same meaning in Acts vii. 27. "Neighbor," in Gospel language, means a compatriot, a person belonging to the same nationality. And so the antithesis used by Jesus in the citation, "_love thy neighbor, hate thine enemy_," must be in the distinction between the words "compatriot" and "foreigner." I then sought for the Jewish understanding of "enemy," and I found my supposition confirmed. The word "enemy" is nearly always employed in the Gospels in the sense, not of a personal enemy, but, in general, of a "hostile people" (Luke i. 71, 74; Matt. xxii. 44; Mark xii. 36; Luke xx. 43, etc.). The use of the word "enemy" in the singular form, in the phrase "_hate thine enemy_," convinced me that the meaning is a "hostile people." In the Old Testament, the conception "hostile people" is nearly always expressed in the singular form.