There are many types of bonds that can connect two souls. Native Americans believe that when someone is possessive of another that they actually take a piece of their soul. Ancient priests or priestesses would devote themselves completely to their deity and form an extreme bond with them, many times such a bond was one where people believed all of their actions reflected the will of that particular deity.
But like was said, don't let the idea consume you. It's driven some to the point of insanity. They become obsessed.
Especially a deity like Anubus needs to be approached within moderation. Just because it's a deity that shows you favor doesn't mean he won't be against teaching you tough lessons that will make or break you, especially if you abuse his help. Deities are like the ultimate parent, and the closer they are to you, the more involved they get. They'll test you, they'll reward you for good things and come down on you when you do something they feel is wrong. It's one reason why I don't worship any deity no matter how much I may feel a connection to them. I like being independent. I'll show them respect and honor, but I don't attach myself to any of them.