Mind???

Today was one of those days of my Life I was in a mood to look within..A long sleepless night made me think about the ups and downs of my Life.I was trying to figure out the answers for a zillion questions which always puzzled me.I could see my mind boiling with some complexes,ego,agony,frustration and a lot more.But what is this 'MIND'?
I dont know if the medical science has a proper definition for it or not.I believe they do have..Many intellectuals must have spent sleepless nights to figure out what exactly this 'mind' means..I havent read anything in particular regarding their findings or any kind of scientific analysis.But I firmly believe that the most complex part of our body is our mind..
For me my mind is sometimes my logic,sometimes my heart or sometimes the necessity of a situation.My mind has always puzzled me.It acts weird when I expect it to act in a different way.Though I feel that I can control it,Sometimes my judgment fails .But my mind never let me fail though I wish I could fail.Thats when I realise that I was under estimating the most wonderful part of me.The so called 'mind' is very cunning.I believed that I am a typical cancerian with a lot of emotions and sentiments..I still am..But what puzzles me is that my mind lets me act emotional when I face a very silly issue and controls my 'unwanted' emotions when I go through a very tough and difficult phase in which I deserve to be emotional and weak..
May be its the ego thats doing the trick!!The more you realise your weakness the more your mind fools you..I wish I could convince it to play along..
But I am amused that God has given each one of us a very interesting Riddle to play throughout your life..When you listen to it,it works wonders to you..But when you try to tamper its path,it plays in a weird way..Tuning it takes time...But the best deal to have with your mind is to challenge it..Play along...see where it takes you...