Rabbi Yitzchak met Rabbi Yehuda while walking to the town of Lod. Rabbi Yitzchak discuss the time the sages at the time of the Talmud, wanted to remove the Evil Inclination from the world, except for the desire for sex for procreation.
Rabbi Yehuda said that the Evil Inclination is needed in the world like rain. Without the evil inclination that raise the desire for the self, there would not be desire to study and reveal light in the world but at the same time there would be no more sins.
“לֹא יָרֵעוּ וְלֹא יַשְׁחִיתוּ בְּכָל הַר קָדְשִׁי כִּי מָלְאָה הָאָרֶץ דֵּעָה אֶת יְהוָה כַּמַּיִם לַיָּם מְכַסִּים”
“They shall not hurt or destroy in all my holy mountain; for the earth shall be full of the knowledge of YHVH as the waters cover the sea.”
Rabbi Elazar says that a kind and positive heart builds the body and soul because the heart is the most important force in the body.
“וְאָהַבְתָּ אֵת יְהוָה אֱלֹהֶיךָ בְּכָל לְבָבְךָ וּבְכָל נַפְשְׁךָ וּבְכָל מְאֹדֶךָ”
“You shall love YHVH your God with all your heart and with all your soul and with all your might.”
Rav Kahana joined them and add that the heart and the liver together are the builders of the body. They control all parts of it. The brain controls the head and the heart and liver the rest of the body.
The three parts that have control over the body are the Brain, Heart and Liver. They have the initials of ‘מלך’, meaning ‘King’ and that’s more than 3
YH – יה- Brain = מח – Soul level of Neshama – Thoughts
V – ו – Heart = לב – Level of Ruah – Motivation
H – ה- Liver = כבד – Level of Nefesh – Action
The heart located in the center of the body as an engine that spreads the force of life to all parts of the body. The lungs protect the heart and keep it cool by providing constant flow of air (אויר, אור). That force of life is the soul level of Nefesh that’s held in the blood. The heart keeps the blood in constant movement. The liver purifies the blood by absorbing the negativity that got attached to it by negative actions. To purify the blood from that negativity we fast to let the liver works without interference of the desire for the self.