How do we know that a universal church is not biblically supported?

The notion of a universal church is not directly supported by scripture; rather, the New Testament consistently refers to local congregations. For instance, Paul addresses the 'churches' of Galatia and uses the plural form in many instances to denote multiple gatherings in specific locations. Furthermore, when Paul discusses the care of churches and refers to specific congregations, it reinforces the concept that the church is made up of visible and accessible groups. There is no explicit mention of a universal church in the same sense as local assemblies, making the latter the focus of biblical ecclesiology.