Why is it so hard?

Sometimes, it seems like everything flows backwards. Why is it so hard to get your children to do what you want them to do? You don't have to teach them to throw a tantrum--that comes programed innately. You don't teach them to say, "Mine!" It only takes one child saying that in front of them. But, you can spend over 100 hours coaxing, prodding, planning for potty training...and it never seems to click.
Today Natalie & I went to church together since Woody was working. We were running late. She had a really cute outfit on, however. I left her in nursery while I went to church. Then, I went back to see her before I started teaching the other class of 2 year olds. She said she wanted to go to potty. I was so excited. We went to the potty and she did potty. Great! However, my horror when we went to pull up her pullup. The hem of her dress was wet! Oh, no! We hadn't tried in so long I forgot to hold up her dress high enough for her. So, she ended up in a summer outfit for the second hour of church.
Of course, she hasn't wanted to go the rest of the day. Only that once! But, maybe it is a start!