The Seat Of Strength
The seat of strength is in the heart. A person whose heart is firm has no need to be afraid of any thing or any person. Such a person can achieve awesome feats and win mighty battles merely through the firmness and steadfastness of his heart. He is never afraid and he does not run from the sight of a fierce battle. So is it in the service of Hashem. Understand this well.
(Rebbe Nachman of Breslov)