if you see yourself truly, you have to love them rather than get angry with them, because you see you are the same as them. You can't get mad at their selfishness if you see you have selfishness too. To condemn them and not forgive would be to condemn yourself.
yes. To grow you need to see yourself as a "we" (part of the body of Christ) not an "I'. That way you are on a team. We are members one of another. If one member is brought down....so are you. If one member is exalted...so are you.
And since this is going the right way...it also helps with humility. So if you move forward...it is not just for you. It is meant to share.