Why is some conflict inevitable in every marriage?

• we are different-different backgrounds, priorities, desires, personalities, opinions
• no good trying to force our partner to do things our way
• must see ourselves as being on the same side (3-legged race)
• we are naturally self-centered
• need to ask ourselves, “Are there ways I need to change for the sake of our partnership?”

Does the inevitability of conflict in marriage surprise you?  Why?  How does it challenge or affirm your approach to conflict?