Jesus says you do not sew a new patch onto an old garment — if you’ve ever done this, you know what He means. The new patch, as it shrinks, pulls away at the old cloth and makes a worse hole than you had in the first place. Jesus says you do not store new wine in an old wineskin; the new wine causes the wineskin to burst so that you lose both the wineskin and your wine.
Jesus says He’s not put on from the outside. You can not go to church and put Him on like a garment – in that He does not fit the unchanged person.
Some churches today are mega-institutions designed, it seems, primarily to put Jesus onto people’s outsides while worrying – at least a little bit – about whether the new look is just a look or is an actual alteration of the people’s insides. I think that little bit of worry is left to life groups.