I forgot who coined that phrase last but I'd like to interject something. I know this will be a slippery than ice subject so I will handle it carefully.
I also know there is no way I'm going to change anyone's view on this but it may possilble cause us to reconsider our atitudes/ approach when conversing with folks of different beliefs.
Iwill only use myself as the bad example here as not to accidently offend anyone.
1.I use to think I could figure everyone out onceI knew what church or denomination they belonged too. Thisis so far from the truth. Christianity goes much deeper than the few doctrinal truths a church may beleive. Yes..there appears to be many similaities...but love is precious.and it doesn't matter if one chooses to worship in an Episcopal church , Pentecostal etc. if the outcome is fruit...and they get that from abiding in Jesus who am I to look down on one because I may be turned off with some of their beliefs.
2. Dealingwith sin in other Christains lives. After many blunders and much prayer I've learned demonstrating a Christ like life has much more value than giving instructions..Peter reminds us "Without a Word we can win our unsaved loved ones by our chaste life style." Trust me...they are watching. They are not missing a trick.
3. When correcting is necessary.....the Word tells us to correct with a spirit of meekness ...and another place speaking the truth in love and Jesus said...go in private...
We are to strive to be at peace with one another...Jesus prayed an entire prayer on the unity of believers in John 17.
4. Different levels....forget that mentality...no matter how close we get to the mark...we must remember still"Our righteousness is as filthy rags." Should we stop aiming..God forbid..there are blessings over flowing to the one who desires to please God with the whole heart..The only thing is..the older in Christ you get the more you realize your helplessness with out Him and that we are all on level ground.Certainly we have different gifts and strenghths and callings but God is the giver of all of those things and they are unearned gifts. Be ye thankful ...
5. Dealing with cults.and such....I honestly use scripture here and pray to God to help me answer with wisdom and love. "The righteous studieth how to answer." the Word says. As Chris has told us many times by His signature
.."Words are like arrows..once released you cannot take them back." Let us aim each arrow carefully AND have ears to hear the master { For He may }whisper oh so quietly. "no...put that arrow back in the quiver and instead pray ." WE must be sensitive to God's Spirit if we are to make a difference.
Tolerate or not tolerate.
We can forgive someone outside the church without much of a problem at all. However when it comes to christians because we expect more out of them or better ect ect we have a HUGE issue with truely forgiving our brothers and sisters in christ. #1Because we have higher expectations for other Christains...#2 My big mistake..I tended to think everyone had the same convictions and thinking process as me..WOW I was shockedto find out that everyone doesn't think I as I do.To often in churches today the Shoot the wounded approach is practiced. When someone is going through a rough time in there life and falls into one of satan's pitfalls, trips ect christians are sadly the first ones to run in and want to shoot the wounded instead of reaching out to them and picking them up. My brother..I've heard many good pastors say these days"There is a shortage on mature beleivers."When christ said Let he who is without sin cast the first stone, he did not put a clause on that for reaching out to a brother who is going through trouble. Love true christian love and forgiveness would prevent most of the "church splits" we see today. Sadly even from some pullpits, the shoot the wounded practice is preached. 
] [:@] And say: "if that's what being a Christian is about-I don't want any part of it". 
