What is the reason behind we dream at night?

Not all dreams are the same. There are some dreams based on our desires or things that we think too much and that dream what most people dreams.But, there are also dreams that have a deeper meaning or connected to our real life.It's kinda a sign or a warning that it could be happened.

Dreaming is how the subconsciousness thinks. Here's the basics of personal interpretation: People/places/things are always symbolic of what it means to you, in context to what's going on in the dream. actions are as actions are - no symbology. Dreams early in the night are about past events; mid-night is in the present; early morning is "what is most probable" based on present condition/decisions. Then lastly - dreams can be about your reality, fears simply being played out for internal confrontation, or they're about strong wishes.

when we think any matter or show some differen things.these thing we dream when we are in subconsious state of our mind.

there are so many things my dear friend because you are sleep at the night so you dream.....