It is hard being stuck to an idea. It becomes the center of your universe. And all you other thoughts converge towards it. When this goes on long enough, it probably becomes a belief, which defines the way you live your life and the experiences you have in it.
But by questioning/inquiring (the hard part), you can remove the idea from the center and consider it to be just another one of your thoughts. And then, Poof! - the idea lets go of you.