How Well Do You Understand Christianity?

Great quote from J.I. Packer –

If you want to judge how well a person understands Christianity, find out how much he makes of the thought of being God’s child, and having God has his Father. If this is not the thought that prompts and controls his worship and prayers and his whole outlook on life, it means that he does not understand Christianity very well at all. ~ J.I. Packer, Knowing God