1. One who wants to taste a taste of the hidden light, that is, the secrets of the Torah that will be revealed in the future, he should increase in [doing] hitbodedut between himself and his Creator and judge and adjudicate himself all the time regarding all his actions and affairs, whether or not such [a deed or affair] is proper and decent for him to do and to act accordingly in front of [the sight of] HaShem who rewards him all the time and at every instance with goodness.
One should manage his affairs with justice and come to justice with himself regarding everything. He himself should judge and adjudicate himself regarding all his deeds and affairs. By this, he will remove from himself all fright and be saved from fallen fears, meaning that he'll not fear any prince or lord, or dangerous beast, or bandits - or from anything in the world. Only HaShem alone will he fear and frightened.
By this, one will raise fear to it's source, which is [divine] knowledge/awareness. He'll attain a whole knowledge/awareness, knowing who he fears, fearing the Honorable Name alone, [with a] fear of [His] loftiness. Through this, he'll merit an attainment [of an understanding] of the revealed Torah and [he'll also merit] true humility. By this, he'll merit prayer [on the level of] giving over of the soul, annulling all of his existence and physicality at the time of prayer. He'll pray without any intentions of self-benefit, not thinking of himself as anything - just annulling his essence and his physicality, becoming annulled as if he isn't even in the world. By that, he'll come to the attainment [of an understanding] of the secrets of the Torah, which is the hidden light that will be revealed in the future.
[All of] this is attained via hitbodedut. (From Likutei Moharan I, 15)
2. The words of conversation that a person speaks between himself and his Creator are an aspect of ruah hakodesh. For through entering into this and compelling and preparing oneself to speak before HaShem, HaShem sends words into his mouth, which are an aspect of ruah hakodesh. All must see to it to put forth effort to always renew [the words/prayer], constantly requesting with pleasing words and new supplications. This is attained through purity of heart which is merited through the motion of the intellect in holiness (as is brought in sec. Knowledge, #3). (From Likutei Moharan I, 21 and 156).
3. Through the conversation that one converses and speaks between himself and his Creator, bringing one's good desires and yearning up to the mouth, [meaning] that which he yearns, craves, and longs for, to leave his evil inclination and attain true goodness; praying and supplicating before HaShem for this.
Through this, he brings out good souls from potentiality to actuality. For through the longing alone, souls are made in potentiality. And through the above stated speech, they (the souls) are completed and go out from potentiality into actuality. By this, one attains making his request and merits forming the letters of the Torah (the Hebrew letters) for good, giving vitality and sustenance to everything and drawing goodness and blessing into all of the universes, and one awakes several souls to repentance via these words he speaks between himself and his Creator.
This matter of bringing up yearning and good desires fully to the mouth is very precious, and all must accustom themselves to engage in this a lot, every day. By this, it is possible to return the world to good. (From Likutei Moharan I, 31)