changing ambitions

I wished to become a doctor in my childhood. that desire became strong when my mamayya(mother's brother) died due to cancer with an unfulfilled desire of becoming a doctor.
At last I had to take up engineering as my father and my headmistress forced me.
Gradually i grew my interest in engineering. There afer my desire was to become a part of indian space research by taking aerospace engineering. With my building ineterests .. i became a great fan of APJ Abdul kalam after knowing about him and reading his biography and set him as my idol.
June 2004 , i regard as the worst period of my life.. Here i failed i 2 aspects......
failed getting into IIT and the desire to take up aerospace engineering perished...the other failure being ... making my father quit smoking by getting into IIT.. which i promised him to achieve and make him quit.. he also agreed for that..
"The first promise i have failed in my life" and thereafter i never gave a promise to others(mostly as i remember)
Now I am doing my engineering in ICT and wishing to take VLSI in my coming future..
I don't know where it takes me.....but my burning desire of taking active part in the development of my nation never died...
The only principle i follow for this and i often advice my friends is......
" Hope it,Visualise it ,dream it and i am sure u can get to ur destiny" and losing hope is the only shortest path to misery...............................