Why All the Blessings?

We say over one hundred blessings every day. There's a blessing for waking up in the morning. We recite another blessing before going to sleep at night. Everything we eat and drink requires a blessing. Then, there are additional blessings when we finish eating. After answering the call of nature, there is a required blessing. We haven't yet scratched the surface. What's the purpose of so many blessings?