What is free will? It is the ability to choose to do whatever you wish to do, whenever you wish to do so, in any kind of situation. Knowing that you have this power, you can take any idea or suggestion that you hear and apply it for your benefit. As Reb Natan explains, free will is the most amazing power in the entire world. The overall rule is that the entire world was created only for the sake of free will. (Likutei Halakhot, Birkhot HaShachar 5:74).
Adapted from Rebbe Nachman and YOU, by Chaim Kramer