Rabbi Meir said: If you study Torah in order to learn and do God’s will, you acquire many merits; and not only that, but the whole world is indebted to you. … You become like a gushing fountain, like a never-failing river.
From “Chapters of the Fathers” in Gates of Prayer, Chaim Stern ed., Central Conference of American Rabbis, 1975, 27.
Matters of Interpretation 