You should have da'as that the one having helped a choteh (sinner) to become a ba'al teshuva and to turn from the toyus (error) of his derech, and from setiyah HaDerech Hashem (turning aside or deviating from the Way of Hashem) will save the neshamah of him from mavet and will cover a multitude of chatta'im. [T.N. This may be the earliest writing in the Brit Chadasha. Of royal blood, Ya'akov Bar Yosef Ben Dovid, like Rav Sha'ul, was an unbeliever until he came to faith by the appearance of the Risen Moshiach (see I Cor 15:7). He died al kiddush ha-Shem 62 C.E. according to Josephus. His brother Yehuda wrote the letter on p.1118. See p848.]