Rabban Gamliel, the son of Rabbi Judah Hanasi, says: “Torah study is good together with an occupation, for the exertion of them both makes sin forgotten. All Torah study that is not joined with work will cease in the end, and lead to sin. All who exert themselves for the community should exert themselves for the sake of Heaven, for then the merit of the community’s forefathers aids them and their righteousness endures forever.”