第二个句子是一倒装结构

有一读者问： 有这样两个句子：

But what makes good teachers good is not their qualifications, it is their conscientiousness. From that will flow all the other capacities needed for serving their students well.

句中的that从句是介词from的宾语吗？ 如果是的话，that从句的主语又是什么？

上述两句话中的第二句是一个倒装句，其主语是名词短语all the other capacities，其谓语是动词短语will flow。that在此不是连词，而是一指示代词，指代其前的their conscientiousness。from that是一介词短语，用作地点状语。needed for serving their students well是一分词短语，用作定语，修饰capacities。全句的大意是：其他教好学生所需要的一切能力皆来自于此。