This is saying that it's good to be happy about little things. Every little accomplishment you make is one step closer to what you are trying to achieve. Don't just think because it is something small that it doesn't matter. If your don't celebrate the little things, trying to accomplish your goal will be hard.
"Generally, by the time you are Real, most of your hair has been loved off, and your eyes don't see as well and you get loose in the joints and very shabby. "But these things don't matter at all, because once you are Real you can't be ugly, except to people who don't understand" The Velveteen Rabbit