Eleazar ben Arach was one of the tannaim of the second generation (1st century). Little is known about him.
Teachings
Described as first among the disciples of Yohanan ben Zakkai,[1] it was said, "If all the sages of Israel were placed in one scale, and Eleazar ben Arach in the other, he would outweigh them all".[2] Yochanan described him as a "gushing stream" or "ever-flowing spring".[2]Alon Goshen-Gottstein and Bertrand Badie wrote that this metaphor of rabbinical sage as spring was central to Eleazar's role in Talmud.[3] They continue by noting he represented a symbol of a particular kind of rabbinical learning, one that not only repeated existing wisdom from the scripture but also innovated, providing new lessons for new circumstance as a spring or a well provides fresh (new) water.
If the difference of opinion concerning the words of R. Yoḥanan b. Zakkai indeed reflects fundamentally different approaches to the study of Torah, we are in a position to identify the circle that gave rise to the praise heaped on R. Eleazar ben Arach. An examination of the variants of this tradition in Avot de Rabbi Natan, suggests that the praise of R. Eleazar ben Arach (the everflowing spring) originated in the academy of R. Akiva. [...] R. Akiva juxtaposes a cistern and a well. The cistern contains only what is put in it while the well provides fresh water. This is the essential contrast between a cistern and a well. Consequently, many disciples come and drink from the well.[4]
^Kedar, Benjamin Z. (2005). Holy Men in a Holy Land: Christian, Muslim and Jewish Religiosity in the Near East at the Time of the Crusades. Hayes Robinson Lecture Series No. 9. London: Royal Holloway, University of London. p. 21.