When I go home at night I have such a feeling of fullness, of gratitude. My students do that for me each and everyday.
I started working with a First grade student about a month ago who was not able to read. Note the operative word here....was! He said the words on the page looked like "blah, blah, blah blah", like "blicywwdhui". His frustration was palpable. Smart and willing to work, he read his first sentence the second time we met.
Purpose and fulfillment doesn't get much better than that!
Fill 'er up!