From Tim Chester:
Churches of glory will put their confidence in mighty works: stage performances, big budgets, large numbers, powerful arguments, charismatic preachers. A church of the cross will be characterized by power in weakness, wisdom in foolishness, victory in shame. Its confidence will be in the sovereignty of God, the presence of his Spirit, and the power of his Word. Jesus said the kingdom of God has been given to “my little flock.” Most of the time it will be under the radar. But, like yeast in dough, it will grow unseen to fill the earth.
My two cents: It would be unfair to assume that Chester is saying that “churches of glory” are only big churches and “churches of the cross” are always small churches. A small church is just as prone to depend on performance, numbers, reputation, money, or the like. Large churches, too, have the opportunity to be communities whose “confidence will be in the sovereignty of God, the presence of his Spirit, and the power of his Word.”