You may feel it more directly if you personally give food to a hungry person.  But you can also feel it when you realize that you have supported an effort that fed a hungry person who lives in the Appalachian Mountains, or a homeless person in Los Angeles.  And, if there are no neighbors close by that hungry person in the mountain, or all of them are hungry, then there is no one else to feed them.  If you can't personally see and personally feed the hungry person, it doesn't mean you aren't called to feed the hungry person you can't see.  

If you can't help the starving person in Syria, does that mean their plight is no concern of yours?

"Thy kingdom come, Thy will be done on earth as it is in heaven."