Illusions

If you are sitting on a beach, watching the sunset,

you can clearly see how the sun is sinking down under the horizon, 
how it is moving.

But it's not the sun that is sinking, it's the earth that is turning.

The movement of the sun is an illusion.

You can be fully convinced about something that is completely wrong.  
You can't always trust your senses. You can't always trust your self.

However, sunsets are wonderful even if it's not the sun that is sinking. 

What difference does it make to you, in your life,
if the earth revolves around the sun, or if the sun revolves around the earth?

What difference does it make if there are tons of universes out there,
or if this universe is the only one?