It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.
Carl SaganWidespread intellectual and moral docility may be convenient for leaders in the short term, but it is suicidal for nations in the long term. One of the criteria for national leadership should therefore be a talent for understanding, encouraging, and making constructive use of vigorous criticism.
Carl SaganThere are many hypotheses in science which are wrong. Thatโs perfectly all right: itโs the aperture to finding out whatโs right. Science is a self-correcting process.
Carl Sagan