Difference between *LISTEN* and *HEAR*

i was once thought that listen and hear are the same...when ppl say...
#i hear u...or
#i listen to u...
do u know the difference?or can u FEEL the difference?

well, a friend of mine pour out this question to me few years back..to my surprise...it's really different

when someone say... * i hear u*...it may not really go to his/her heart..just like a wind blow by..u hear the voice...but u dun really know the content...

but when someone say * i listen to u*...this is much different from i hear u...
when he/she say i listen to u...he/she really pay attention to every single word..
they will listen whole-heartedly..

so friends...hope u guys listen to my sharing this time...lol~