I walk with angels all the way,
They shield me and befriend me;
All Satan’s power is held at bay
When heavenly hosts attend me;
They are my sure defense,
All fear and sorrow, hence!
Unharmed by foes, do what they may,
I walk with angels all the way.

Of course, we have to be careful what is taught about angels. No, we are not assigned a specific angel when we are born. No, angels do not look exactly like the topper on your Christmas tree. We do not become angels when we participate in a program sponsored by a popular day-time television host.

There are good angels and bad angels (demons).

Christian Cyclopedia says that good angels in the New Testament have a Christ-centered emphasis.

Demons, the chief of whom is Satan, are fallen angels. They will have no part in God’s eternal reward. Check out Christian Cyclopedia’s notes on demonology, demons, and the Devil here.

For a more detailed description check out Koehler’s Summary of Christian Doctrine.

For an even more detailed description check out Mueller’s Christian Dogmatics.

For the nitty-nitty gritty-gritty on all things theological, there is always the Pieper’s 3-volume set. It helps to know Greek, Hebrew, and German if you are going to go this route.