Sometimes those words aren't very clear. We use formal, prayer-book language when perhaps we need to make things a whole lot clearer. Because what we did this morning was to make her story part of Christ's story, to tie her to Christ for ever. She and Christ are bound together, and us with them. But even that is not all.
Baptism is about water, and water is about all sorts of things.
We mostly think of water as good. It quenches our thirst, it helps things grow, it keeps us alive. But water is also dangerous - as you know all too well. Too much water means floods and destruction, too much water can mean death by drowning. And baptism is about both the promise and the danger of water.