How can you believe in God when you cant see Him ?

"How can you believe in God, when you can't see, hear, touch, smell, taste or even imagine what He is?"

 
We know from the teachings of Muhammad, peace  
be upon him, that no one has ever actually seen God  
- at least not in this lifetime. Nor are we able to use  
our senses to make some kind of contact with Him.  
However, we are encouraged in Islam to use our  
senses and our common sense to recognize that all  
of this universe could not possibly come into  
existence on its own. Something had to design it all  
and then put it into motion. That is beyond our  
ability to do, yet it is something that we can  
understand. 
We don't have to see an artist to recognize a  
painting, correct? So, if we see paintings without  
seeing artists painting them, in the same way, we  
can believe that Almighty God created everything without  
having to see Him (or touch, or hear, etc.).(1)