The Exilarch ("Reish Galuta") of Babylonian Jewry, Huna Mori bar Mar Zutra, was executed in Pumpadita by order of the Persian emperor on the 18th of Tevet of the year 4229 from creation (469 of the common era). Also killed on that day was Rav Mesharshia bar Pekod (the third Jewish leader who was arrested with them, Rav Ameimar bar Mar Yenuka, was executed two months later).
The 18th of Tevet the yahrtzeit (anniversary of the passing) of Rabbi Zvi Elimelech Shapiro of Dynov (1783?-1841), author of the Chassidic work B'nei Yissachar.
Links: Read two stories about the Rabbi
Forty-Three Rubles
The Mystery of the Troubled Wool Merchant
Also, learn a teaching of the B'nei Yissachar
All of Jewish philosophy is but an attempt to fit inside the human mind that which is contained within the heart of a simple Jew.
It will never fit.
But you must learn, contemplate, and ponder with your mind, nevertheless. Perhaps, once aware of its inadequacy, your mind will awaken the heart from its slumber.