If you add a little leaven into bread dough, it will leaven the entire lump. If that leaven is sin, it can have a corrupting effect on an entire church. If it is something good, it can have a positive effect on an entire church.
I have watched a little leaven at work doing damage to nearly all of the Christian Church. There are many things I can point to where leaven was introduced to the body of Christ. The most recent leaven was probably what some call the seeker friendly movement. It has done such damage, it would take a move of God to undo it. Still, I am aware of the power of leaven and how it can spread. Perhaps if we introduce the leaven of truth into the mix, it will spread and at least help reverse things to some degree and save some.
I think the true problem began when the idea was introduced that technically no matter what we do , we cant lose salvation . I think once that door was opened slowly but surely over time it was easier to keep getting just a bit worse and still feel saved . Guess we might want to ponder on that one a bit . Now the leaven of seeker friendly , could never have worked had the churches been alert and diligent and been hearers and doers and had remained solid on the entire pattern . Things just keep getting worse . Watch how fast this last move will move . This all inclusive one . The all inclusive was easier , once the churches had been introduced to seeker friendly . Seeker friendly was to warm them up to the final falling away . And it worked . And its working . But , NOT ON THE TRUE LAMBS IN CHRIST IT DONT . THE LORD has HIS sheep , and they just wont whiff n sniff a lie .