To narrow our minds

"The idea that an open mind is important above all else is so prevalent that any suggestion that some narrowing is essential might be seen as heresy. But it is the only way. Do you treat the claims of Branch Davidians and other fringe Christian cults as seriously as you do the claims of the world’s major faiths? When you hear someone has claimed the end of the world is nigh, do you always thoroughly check them out to see if they are right? I hope not. We narrow our minds not just to avoid wasting mental energy but because we have to."