:In 12 Step circles the convention is generally capitalization (see Big Book quotes). For many 12 Steppers, HP is interchangeable with God... and yet allows those who aren't believers in a single God figure to be included without having to ascribe to such a God. It's a piece of multivalent jargon and its very ambiguity has ensured its usefulness and increasing popularity. Only wish I had a source to quote for it ;-) For now, that ambiguity is simply reflected in the varying perspectives on the page.