a) According to the peace in the generation one can draw all the world to the service of G-d, "to serve Him with one consent" (Zephania,3,9).For, by peace that exists between people, they can speak to each other and inquire from each other about the ultimate purpose of life and all its vanities. They explain to each other the truth, that in the end nothing will be left of a person other than what he prepared for himself towards the eternal life after death. Silver and gold, jewels and pearls don't accompany a person to the world of eternity, but rather, Torah and good deeds alone (Perkei Avot,Ch.6). By realizing this, everyone will throw away the falsehood of the idols of silver, and he will approach the truth, turning to the Holy One and His Torah and prayer. However, when there isn't peace, and certainly when there is controversy, Heaven forbid, people don't talk to each other about the true purpose of life. Even when they do meet and talk, their words don't enter the heart of their fellow because of the desire to win, controversy, hate and jealousy, for these things can't bear the truth. (See Torah, 122) This means that the main reason for most people's distance from G-d is the controversy that has become widespread in our days through our sins. May the Holy One have mercy on us.
b) Through the guarding of the covenant one merits to true enlightenment which is called "the glory of the face", that's to say, the mind is refined by the wisdom of the Torah which one learns to explain with grace and beauty through the thirteen rules of interpretation. This is an aspect of "the glory of the old face" (Shabbat,152) as it says, "Honour the face of the old man" (Leviticus,19).This is an aspect of what it says that the face of Ya'acov was like that of Adam (Midrash,Ch.84). By the aspect of 'old man', the aspect of Ya'acov, one merits to peace, as it says, "Ya'acov came in peace" (Genesis,33). And the Sages taught that he came in peace; complete in his body, his money and his Torah (Shabbat,33).
c) According to the degree that a person purifies his wisdom through the thirteen rules, as mentoned, so he merits through this to purify the voice of his song. For the voice is according to the wisdom of the interpreters of the Torah and the intelligence of the thirteen rules through which the Torah is interpreted.
d) When one's voice becomes purified, then, by the voice of one's song alone without words, the Holy One saves you from all your troubles and by this one merits to peace and you can draw all the world to the service of G-d.
e) By rectifying the brit, one merits to a voice, to purify the voice of one's song. Ya'acov, who guarded the brit, as it says, "the first of his seed" (Gen.49), merited to a voice, as it says, "The voice is the voice of Ya'acov" (Genesis,27). Then by his song and tune alone, the Holy One sees who is causing us distress, which nation from the seventy is causing us trouble. And He saves us from the trouble. Therefore, when there is a decree or trouble caused by a nation to Israel, Heaven forbid, it is good to sing the song (anthem) belonging to that nation which is causing us the suffering, G-d save us. That is what it says, "He saw their affliction when He heard their song" (Psalms106:44). That's to say their specific song and tune. By singing for the sake of Heaven we can arouse the mercy of the Holy One so that He sees our distress which stems from one of the nations and He saves us from them.
f) By rectifying the brit, we merit to a voice, and from the aspect of voice we merit to peace, like it says, "Song of songs of Shelomo" (Song of Songs,1,1). 'To the king that peace is his.' That is why, immediately after the voice of song at the Red Sea the Israelites merited to the peace of Shabbat, as is written, "And they came to Mara" (Exodus,15,23) where they were commanded to keep Shabbat for the first time (Sanhedrin,56). That is what it says, "Miriam answered them, sing to G-d" for the initial letters of the verse spell out 'shalom', peace. Through the song they merited to peace. (See Zohar,Pt.3,176,B)
g) Specifically in Mara they received the peace of Shabbat for it is the way of peace to be clothed in bitterness (Mara means bitter) like it says, "In peace I had great bitterness" ((Isaiah38:17). Similarly, all the medicines are bitter herbs, so is peace which is the cure for all things, like it says, "Peace for the near and far…. I will cure him." (Isaiah 57:19). Its way is to be clothed in bitterness. All the different forms of weaknesses are an aspect of conflict; there is conflict between the four basic elements when one overcomes another. A person has to see to it that he has peace for that is the cure. The same is true with the mentally disturbed for they have a conflict between their soul and body, as it says, "There is no peace in my bones because of my sins" (Psalms, 38). We have to get cures through bitterness. Sometimes the weakness is so great that the patient can't suffer the bitterness of the medicines, then the doctors give up on him and cause him despair. So also when the sins become strong, which are the mental sickness, the patient can't stand the bitterness of the cure, and then nearly all hope is lost, Heaven forbid. However, the Holy One is full of compassion, so when He sees a person who wants to return to Him, but he hasn't the strength to stand up to the bitterness of the cures, He has mercy on him and throws over His shoulder all the person's sins so that he won't need to suffer a lot of bitterness for the sake of a cure, just that which is according to his strength to take. This is what it says about Chezkiahu, the King, who praised the Holy One, saying, "In peace…You have cast all my sins behind Your back" (Isaiah,38:17). From here, every single person should learn if he wants to have mercy on his life and return to G-d, that, in most cases, when a person begins to enter the service of G-d and come close to the Holy One, all sorts of obstacles and suffering from all sides suddenly occur to him, each person according to his own set of circumstances; and it seems to him sometimes that he can't stand such bitterness, suffering and obstacles; many have fallen because of this and become distant again, Heaven forbid. But, someone who truly wants the truth has to know and believe that all the bitterness, suffering and obstacles that he suffers come from the great loving-kindness of G-d. According to his many sins he should suffer very much more bitterness for the sake of his cure, to such a degree that he wouldn't have the strength, in any manner, to stand up to it. Then he would lose all hope, G-d forbid. But the Holy One has mercy on him and doesn't send more bitterness or suffering than he can stand. However much he suffers, he certainly has to suffer and certainly he has the strength to suffer it, for the Holy One doesn't send to any person bitterness or obstacles that he can't stand up to and break, even though, according to his deeds, he should get more.
h) The peace he needs in his body is between the four humours so that one won't overcome its fellow. He needs peace in his money, that this one shouldn't come and take the other's, as the Sages said (Ketubot,66). Peace in his Torah means without doubts which are an aspect of conflict. Then one will merit to fulfill the verse which says that "Ya'acov came in peace from the town of Shechem." One should take inspiration from this to "serve Him with one accord" (Tzefania,3) through peace.
i) To achieve this level of bringing the entire world to serve G-d is possible only by rectifying the brit. When a person sees that he gets immoral thoughts about women, yet he breaks his desire and removes his mind from them, this is the main thing in his repentance and rectification of previous blemishes to the brit, each person according to his level. This is called 'complete', or 'balanced' repentance. Therefore, don't feel discouraged when these very despicable thoughts overcome you, for precisely by getting these thoughts and overcoming them is the main rectification and your complete repentance when you discard them. By this, you extract the holy sparks that fell into the husks by your blemishing the brit. As a result, you will merit to rectify the brit, purify your wisdom and voice, eventually meriting to peace and to draw the entire world to the service of G-d.