Never Believe you are always right, it's the worst way to find out you're wrong
Everybody has an opinion. Too many times we are told every opinion is valid. But not all opinions are right. Someone may have an opinion that the sky is blue. Someone else will say that the sky is red. Are both wrong or both could be right at different times? The difference between having an opinion and believing you're right is that you believe that your opinions are facts. Facts that are correct all the time. Even correct facts are not correct all the time. Take the sky example again. It's not always blue because sometimes you can get red. If you believe that the sky is always blue, what would you say when you see the sky is red at sunrise or sunset? Would you still claim that the sky is blue even though it's red? And how about if you learn that the sky isn't really blue because it's really the effect of gas particles in the atmosphere that's making it look blue? Will you still claim you are right or will you learn something new?