Y is it so????????????

Hi folks;

I have got many number of Questions to ask u...its just to clarify my doubts...

1) Y is it that the mind go totally blank at times though u can hear& see everything?

There r times when nothing gets registered into one's mind though the other person keeps on talking n asks u ur opinion...know not y all those words just gets washed off before u could really understand what they meant..n at these times u just stare at the other person as though u r seeing them for the first time.....

2)Y is it that some people gets the boon of just wiping out all the hardships or even the persons n the relations that u used to have with them?

I personally feel that some people can just train their mind to believe in what they really want n just discard everything else that they feel r disastrous to them...

3) Y is it that u cant get into a decision when a conflict occurs between ur mind and heart?

whose decision should we give ears to when our mind n the heart wants two different things?

Can U plz clarify my doubts????????