In Matthew 7 Jesus explains how removing the log from one's own eye would allow one to more clearly see the speck in a brother's eye. Many of us might counter that we can see our brother's specks just fine, even with logs obscuring our view. So why does Jesus ask us to remove our own logs first?
The sad truth about having a log in your eye is that much of the time it doesn't come out. A lot of our most challenging shortcomings stay with us, to some extent, throughout our lives.
If you have never had a log removed from your eye then it is probably still there. If you have had a log removed from your eye then you should have learned the grace to deal with the speck of another.