Tanya: XVII. It is known (p. 481) ...note there carefully]. (p. 483).
Our first father, Avraham, as a result of his avoda with self-sacrifice to make G-d - the one G-d - widely known among all mankind, merited to bequeath to his descendants (to the end of all generations) pure faith in G-d and His Torah. Hence, every Jewish man and woman has the power and fortitude to offer his life for the holy Torah.1
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