Rabbi Yehudah, surnamed the Holy, the editor of the Mishnah, is the personage here and elsewhere spoken of as the Rabbi by pre eminence. He was an intimate friend of the Roman Emperor Antoninus Pius.
One thing obtained with difficulty is far better than a hundred things procured with ease.
Avoth d'Rab. Nathan, ch. 3.
In the name of Rav, Rabbi Yehoshua bar Abba says, "Whoso buys a scroll of the law in the market seizes possession of another's meritorious act; but if he himself copies out a scroll of the law, Scripture considers him as if he had himself received it direct from Mount Sinai." "Nay," adds Rav Yehudah, in the name of Rav, "even if he has amended one letter in it, Scripture considers him as if he had written it out entirely."
Menachoth, fol. 30, col. 1.
He who forgets one thing that he has learned breaks a negative commandment; for it is written (Deut. iv. 9), "Take heed to thyself ... lest thou forget the things."
Menachoth, fol. 99, col. 2.
A proselyte who has taken it upon himself to observe the law, but is suspected of neglecting one point, is to be suspected of being guilty of neglecting the whole law, and therefore regarded as an apostate Israelite, and to be punished accordingly.
Bechoroth, fol. 30, col. 2.