you don't know whether you can achieve it or not but in order to start the course of action you need to think about it.....no matter how diplomatic the situation is just think there is no objection to think, you have think freely!!
I believe in, brain is all that matters and its not like stop, start, play life to just do when ever we want to do anything!!! Every thought and every word we speak is influenced by our attitude and besides that attitude is the main cloud in the action map so one should have a good attitude,..ATTITUDE doesn't mean: careless thinking, cares for no one but, only think about himself blah blah blah!!. Just attitude is the way u live, the way u think about the problem its all about your environment passion towards a goal . So it's very important to have GOOD ATTITUDE so that you can THINK BIG :)