A quotation from Sayings of the Jewish Fathers, another wonderful selection from the Midrash and the Talmud.
"3. Antigonus of Soko received from Shime'on ha-Çaddiq. He used to say, Be not as slaves that minister to the lord with a view to receive recompense; but be as slaves that minister to the lord without a view to receives recompense; and let the fear of Heaven be upon you."