Second-guessing is a function of the conscious (wakeful) mind. Often, as thinking human beings, we have grand ideas that we squelch with logical thinking. This process can be a safety feature, as when questioning some spontaneous desire to climb on top of a rickety stool to be able to reach something that's higher than we could touch otherwise.
The logical conscious brain reminds us that standing on a rickety stool is unsafe. That's when our subconscious or dream brain focuses on the easiest solution to reaching that which we desire (e.g., standing on the stool, regardless of how unstable it is).
HOW THIS PRINCIPLE RELATES TO RELATIONSHIP CONFLICT
Because you and I want to get along with our significant others, or family, we can RATIONALIZE away any relationship conflict. We can consciously tell ourselves that the other person did not mean to create chaos, drama, or say something highly irregular or even mean toward us. We might even deny our emotions to the point where we and ourselves that someone else's divisive behavior is not our fault.
When someone comes to me to resolve issues relating to dysfunctional relationships, they are often amazed to enter into trance and suddenly realize that the person they are having conflict with exhibits the same behavior they had to tolerate from a parent, sibling or care giver, as children. Sometimes a spouse will mirror the habits and destructive actions that caused the patient significant grief throughout childhood.
Once such a patient enters into trance, he or she can look at their own pain and release it. She or he will often see a much bigger picture than they've ever been able to consider before.
Hypnosis expands the way people see the world because as soon as the conscious mind goes to sleep, the patient can acknowledge how s/he feels, authentically.