The importance of learning Mussar is well-known and publicized, to the extent that when Chazal said “I created an evil inclination; I created Torah as an antidote!”, the commentators say that it refers to the learning of Mussar. As a general rule someone who does not learn Mussar regularly, will never have really experienced the fear of sin, and his ways will be perfect in his own eyes, and he will think in his heart that he is a fine upright Jew. Even if he hears words of Mussar or studies them once in a blue moon, it will have no effect on him at all, and about such a person it is said that “Wicked people are considered dead even when still alive!”, as they are like dead people who do not sense at all the fear and love of Hashem through the fire of the flame of Hashem to know what to do, and because of this they will not rejoice over the ability to fulfil the commandments of Hashem like someone who has found a vast treasure, nor do they mourn their sins like someone whose close relative has died and is lying in front of him, as really they should, and everything depends on the purity of the soul.
ג׳ בתשרי ה׳תשפ״ג
My brother and my nation, take this Torah book, in this and like this learn well, listen and revival your soul, you will achieve joy and joy, in this world and next world. (from introduction of the author) 1