pupils.

(17) Cf. chapter IV, 12. One of the qualifications necessary
for the acquirement of the _Torah_ is moderation in business.

(18) Do not boldly push yourself forward; but where there is
no one to fill the position of teacher or leader, or to be the
head of the community, and you have the qualifications, do not
shrink from being the man.

(19) Retribution is sure. Cf. _Sanhedrin_, 100a and _Sotah_,
9b, "with what measure a man measures, is it measured unto
him."

(20) Cf. Prov. III, 1 and 2.

(21) The expression "the world to come" may mean the Messianic
days, the time after the Messianic era, the days after the
resurrection or the spiritual hereafter. Maimonides discusses
at length the various theories, in _Perek Chelek_ (Commentary
on _Sanhedrin_, X, 1), which has been translated into English
by J. Abelson, in the _Jewish Quarterly Review_ (London), vol.
XXIX, p. 28 _et seq._ See also _The Hebrew Review_ (London,
1840), p. 254 _et seq._ Consult Schurer, _History_, II, ii,
92.

9. Rabban Jochanan, the son of Zakkai (22) received (the tradition)
from Hillel and Shammai. He used to say, "If thou hast learnt much
_Torah_, ascribe not any merit to thyself, for thereunto wast thou
created."