I wrote a letter to our children as each became a teenager. In one I talked about our identity in Christ, remembering that when I was a teenager, I felt unsure of myself, lacking confidence. I had to learn that I was God’s beloved—His child. I said in the letter, “Knowing who you are comes down to knowing Whose you are.” For when we understand that God has created us and we commit to following Him, we can be at peace with who He has made us to be. And we also know that He changes us to be more…