Have you ever noticed, when you are riding in a group, at the same speed as other motorcycles, you have the perspective that none of you are really moving? According to the theory of relativity, when two objects move at a steady velocity in relation to each other, it is impossible to tell which objects are and aren't moving.
But once you take your eyes off the other and onto a stationary object, you can see at once that you are moving.
In life, I think we like to compare ourselves to each other. But the problem with that is, when we compare ourselves to another imperfect person we cannot see our own sin. Only when we examine our life in comparison to the one who knew no sin do we have an accurate and true picture.
If you want to see an accurate picture of yourself, look to the Jesus, the Word of God, not to each other.
"But whoever looks intently into the perfect law that gives freedom, and continues in it--not forgetting what they have heard, but doing it--they will be blessed in what they do." James 1:25 (NIV)