An interesting quote from RC Sproul, Jr. We all see the world through our own eyeballs and of course think we are right. If we thought we were wrong, we'd change our position. The question is where. The key is a teachable spirit.
"I was once engaged in friendly debate with a co-worker. She, growing frustrated with me, complained, “You always think you’re right.” She paused for a moment when I explained, “Of course I always think I’m right. So do you, think you’re always right. But I don’t think I’m right always.” All of us, when asked about this or that, always agree with us, which is another way of saying we always think we are right. All of us, however, know we are fallible, and thus we don’t think we are right always. The trouble is I believe a, and b and c, all the way down to z. But I know I must be wrong somewhere. If I knew where, then it would be easy. That’s the problem with blind spots- they are invisible to us."
"Herein lies one of the blessings of friends we can trust. Too many of us, present company serving perhaps as the worst offender, pick and choose our friends precisely on the basis of their having the same blind spots we have. That is, thinking ourselves fine fellows because we believe a and b all the way to z, we naturally think that others who agree with our wisdom are the very best kinds of friends to have. Jesus told us what ends up happening here- the blind lead the blind and there’s danger up ahead. Friends we can trust, however, have far more to do with their character than their ideological test scores."