when we say we had a dream last night, we think we had something unreal in our mind that came out in our dreams. In my opinion, however, I always reckon the dreams as partial reality because I have the courage to be myself in my dream, doing what I want to do, having what I want. Compared to these, in real daily life, I usually pretend to do things I have to do, be the one I need to be.
dream, in some situations, means a goal or destination, which purges us to make a lot of sacrifice to attach it. In reality, we ought to balance the reality and dream(here, it means goal), ought to yield to the condition, sometimes even ought to disobey our mind. But in dreams, we can put these aside, the most realistic demand can be performed in our-own paradise.
Of course, nightmare often brings bad mood to us, which in another perspective is also the reflection of our demand or genuine emotion. So, how can we say we live in reality when we live in daily life, and say we had a dream last night?
Only you follow your heart, can you live in reality, or where you are living in is just others' world.