I spend a lot of time saying "you can't have that" to my daughter. That she asks for everything is a function of being seven, of being a kid, of not quite understanding the boundaries yet, how money works, how time works, how practicing works. That she's starting to get it sometimes breaks my heart.

The other day she said she wanted a cookie, but she knew she couldn't have one until after dinner. As she stared longingly at the cookies made by her grandmother and trucked 500 miles across Iowa, I realized that I could probably leave them out and leave the house and she still wouldn't eat one, because she is starting to get it.

Yesterday she brought home a baseball card she'd made for herself at school.

I thought about what it means to want anything, to wish for a magic genie to grant your heart's desires. I remember wishing for that, hell, I still wish for that. It's not even about money, it's also about accomplishments or love or friendship.

It stuck in my head, and as I went to bed last night I thought there are junctures in life where you probably could have anything, but to get to what you want, you sacrifice other things. You sacrifice time for money, money for time, family for career, career for family, dreams for peace, peace for dreams, relationships for autonomy, autonomy for relationships. It's all a trade-off. But you probably could have anything if you single-mindedly went through life focusing only on that one thing. I have a quote that I often read that says something like "the reason more people fail instead of succeed is because they sacrifice what they want for what they want right now." And what I want right now is usually a nap or a big Kindle download.

I've started saying more often to her, "You can't have that right now." That toy she wants? She might get it for Christmas or with her allowance or piggy bank money. That cookie will be hers in a few hours. That perfect turn-out might come with years of practice. It all boils down to what makes sense right now, in this moment, and maybe the key to happiness is accepting that.

So perhaps it's not "you can't have that," but "you can't have that right now." Or "consider what you'd give up to have that and decide if that's what you really want."

I can teach her to eat healthy food before she eats a cookie, but I can't teach her what her heart desires most. Only she can answer that for herself.