Happiness is seeing the benefits of good, hard work. Watching the things you've planted with your own hands springing up fresh and green. And then... harvesting them!
19 seconds sound clip from The New Adventures of Winnie the Pooh - Friend, In Deed / Donkey for a Day (S1E2).
You can hear this line at 00:16:24.440 in the Blu-ray version of the TV Series.
Quote context
[...]
- Why do I have the feelin' this is not gonna be much fun?
- But it will be fun. More fun than sitting on your old mountaintop.
- Because it's time for your solo.
- Why, certainly. I don't understand... My big feet... Oh, dear.
- Not that an Eeyore's tail is very important, but could you maybe stick it back in the right place?
- Swimming? No. Dancing? No. Oh! Perhaps running would make Eeyore happy. Even I could teach him that.
- Slow down! Slow down! Stop running so fast!
[...]