Our desire gives meaning to the letters and words that we speak.
If we have good desires, we will speak good words and thereby create good letter and word combinations. This will, in turn, eventually lead us to perform good and kind acts.
If however, our desires are for evil, we create evil combinations and bring these into the world.
Chaim Kramer, Crossing the Narrow Bridge
We have complete control over our free will.
Free will is the ability to choose knowingly between good and bad, true and false, right and wrong – and then to act in accordance with what we have chosen.
So great is our freedom that we have been offered the possibility to accept or, G-d forbid, reject the One who provides us with all these freedoms: G-d Himself.
Adapted from Rebbe Nachman as cited in Mayim: Water, by Breslov Research Intstitute
The essence of strength and valor is in the heart.
For a person who is strong-hearted does not fear any person or any thing, and is able to perform awesomely valiant acts and to win fierce battles through the strength and fortitude of heart.
He fears nothing and runs right into the heat of battle.
Exactly the same thing is true in the service of G-d. Understand this well.
Rebbe Nosson of Breslov. Kitzur Likutey Moharan I: 249