There are two types of service and good deeds. One are those that are visible, tzedka, returning a lost item. The second are those that are not seen, loving H'shem, thoughts, not hating someone in your heart. H'shem says that for visible deeds he will give visible rewards and for hidden deeds he will give reward in the world to come. As it says: " For the fulfillment of observable duties, the Creator bestows a visible reward in this world . For the fulfillment of inner, hidden duties, He gives a hidden reward."
pg 441
pg 441
