Okay, so I stole this title from the back of a t-shirt at the gym, but it's so true! Hard work is good for us. We hate it sometimes; but when you really think about it, it sort of feels good to work hard.
I sometimes sit around wishing I were in great shape, eating chocolate, and I end up feeling fat and disappointed, and convinced that wishes never come true. Other times I work out like a crazy woman, until my body is that great kind of sore that makes you feel your muscles and know they're there. Then I end up successful. The hard work works.
Sometimes my students wish they got better grades, and they get mad at me when their wishes don't come true. Other times they work hard and really show vast improvement, growth, and knowledge. Then they feel self-confident and know they have accomplished good things. The hard work works.
I'm not saying wishes don't come true, because I think wishing is an extremely important first step. You have to wish for everything you want--you'll never get ahead if you don't set your sights ahead. Sometimes wishes have to be followed up with hard work before they can come true, but they certainly can come true.