Rabban Gamliel used to say: Make a teacher for yourself and remove yourself from doubt, and do not be wont to tithe by es-timation.

Shimon his son says: All my days I grew up among the Sages, and I did not find [some- thing as] good for a person other than silence. And study is not the main [objective], rather action [is]. And whoever talks excessively brings sin.