This time last year, I was overcome with anxiety over my daughter starting kindergarten. I was worried for her because public school can be a big, scary place, and I was worried for myself because my mental balance was disturbed by the fact that my girl was growing up too darned fast.

I found out this morning, when I sent her off to first grade, that letting her go off into the big wide world of school wasn’t really all that much easier this time around. Because it turns out that your first grade baby is still your baby, just a year older and even further removed from the tiny, helpless newborn she once was.

Would it be excessive for me to make her wear a label with this picture on it and the caption, “ATTENTION UNIVERSE: I USED TO BE THIS. So be nice to me. Or you will have to deal with that lady in the hospital gown.”

In six years of parenthood, I can say with some authority that I have learned two things. First, I’ve learned that bringing your first child through her newborn phase will feel like the hardest thing you have ever done, and when people with older children tell you that it just gets harder you will want to stab them in the eyes with a fork. And second, I have learned that it just gets harder.

I used to think that, once my daughter could just tell me what was wrong, parenting her would be so much easier. It wasn’t. Because once your children start being able to tell you what is wrong and how you can make it better, they start demanding things that are impossible for you to give them. I will never forget the night my daughter, then two, begged me, sobbing, to make the sun rise up again after it had gone down. As much power as we parents have in our children’s lives, we cannot alter the functioning of the universe. My daughters still struggle to accept this fact.

As your children get older, their problems get far more complicated. They argue and defy you and do things that are bad for them. They struggle, and there is often nothing — nothing — that you can do to help them. The power you once had to tailor their world to fit them diminishes with every passing year.

For me, one of the hardest parts of parenting has been coming to terms with the overwhelmingly bittersweet feeling of watching my daughters grow up. I am awed by and in love with the people they are becoming. My girls are awesome, and their awesomeness just becomes more evident as they grow older. I’ve never experienced anything as satisfying as watching my daughters grow into the people they are meant to be — and the best part is that I have many more years to experience this phenomenon.

But as they move closer to the people they are becoming, they move further away from me. It is a distance that I feel, physically. My arms were once full of them; if they moved through the world it was because I was carrying them. And now they are moving through the world on their own, with my guidance and love behind them but not surrounding them. I love who they are, but I miss what they were.

I never knew that an adult could experience more angst about her children growing up than a teenager does who is in the throes of coming of age. But there you go. Parenthood is hard, and it is hard in so many ways.

Fortunately, as I struggle with letting go, my big first grader is delving into the new school year with her customary verve.

She is pretty amazing, isn’t she?