Komentaryong Sumisipi para sa Mga Awit 139:21

And he should not be embarrassed - Refer to the Mishna Berurah quoting the Beis Yosef. Know that the Beis Yosef is only dealing with [a case of] where he does [an exclusively] personal Mitzvah and men mock him, for then certainly their is no thoughtful assumption to mock them, nor to quarrel with them. However, if he is in a situation where there are heretics who rise against the Torah, and want to pass certain rules in matters of the city, and through this, detach the public from the will of Hashem, and, if one would try to negotiate peacefully, they wouldn't listen to his words- the Beis Yosef wasn't speaking about an example like this at all. Rather, it is a Mitzvah to hate them and to quarrel with them and to contradict their advice in whatever way one is able. As King David said in the verse, "For indeed, those who hate you, O Hashem, I hate them, and with those who rise up against you I quarrel! With the utmost hatred, I hate them...."(Psalms 139, 21).

The thirteenth principle The Revival of the dead and we have already elucidated it. And when a person believes in all of these principles and his faith in them is clarified, he enters into the category of Israel; and it is [then] a commandment to love him and to have mercy upon him and to act with him according to everything which God, may He be blessed, commanded about a man towards his fellow, regarding love and brotherhood. And even if he does what is in his ability from the sins, because of desire and the overpowering of his base nature, he is punished according to his sins, but he [still] has a share in the World to Come and is [only considered to be] from the sinners of Israel. But if one of these principles becomes compromised for a person, behold, he exits the category of Israel and denies a fundamental [dogma] and is called an apostate, a heretic and 'someone who cuts the plantings.' And it is a commandment to hate him and to destroy him, and about him it is stated (Psalms 139:21), "Do I not hate those that You hate, O Lord." And behold, I have written at great length about these things and I have gone on a tangent from the subject of my composition, but I have done this because I saw an [important] point to it about faith - as I have collected many useful things scattered in [various] great books. And you should know them and have success with them and review (these) [over them] many times and reflect on them with a proper reflection. And if your heart carries you away to think that you understand its content from one [reading] - or from ten - you will know that it has carried you away falsely. And therefore, do not haste in your reading of it; since I did not write it according to that which [just] came to me, but rather after great analysis and reflection. And after I saw clear and true opinions and [also] those not true, then I knew what was fitting to believe from them and brought proof in the claims and proofs on each and every matter. And it is from God, may He be blessed, to fulfill my wish and to guide me in the good path. And I will [now] return to the subject of the chapter [in the Mishnah].

כי תצא למלחמה על איביך, When you go to war against your enemies, etc. Why did the Torah need to write this whole introduction when it would have sufficed to write: "when you see an attractive woman amongst the prisoners, etc." The whole of verse one seems extraneous to the subject matter under discussion! Furthermore, seeing the Torah did decide to write: "when you go out to war against your enemies, etc.," why did we need the words "against your enemies?" Against whom does one go to war if not against one's enemies? Perhaps the reason is to be found in halachic relaxations which apply to troops in wartime. A woman such as the attractive woman prisoner mentioned here would be totally out of bounds if not for the fact that she was captured in war; the same applies to other relaxations of the halachah such as the prohibition of eating the hind parts of a pig, etc, (compare Chulin 17). This gave rise to the Torah using a different style in this instance. Seeing that the Jewish soldier was aware of the halachic relaxations which are applicable even to Torah law under conditions of war, the Torah was concerned lest some of the soldiers would actually look forward to the battle in order to avail themselves of these relaxations of Torah law. The Torah was keenly aware of this and reminded the soldier that when he goes to war his only purpose should be to avenge himself on the enemies of the Jewish people, not in order to have an excuse to indulge in things which are normally forbidden. The words כי תצא, "when you go out," are a reminder that although you depart from the normal rules of halachic restrictions when your life is at stake, למלחמה, your mind must concentrate only on the war, on the battle, not on what you consider the fringe benefits. The reason the Torah adds the words על איביך, "against your enemies," is to remind you that your enemies are G'd's enemies as we have been told by David in Psalms 139,21: "O Lord, You know I hate those who hate You, and I loathe Your adversaries." Your entire reason for going to war must be for this sole purpose. If that will be the case, then the Torah's assurance: "and the Lord your G'd will deliver them into your hand" will be fulfilled. From our verse (verse 1) you may deduce therefore that unless your motivation is the one the Torah expects of you, your success will not be assured.