We quote from the introduction to that paper since it both states the type of problems that Zorn was examining very clearly, and also because it illustrates his clear style of writing mathematics:
Kami quote mula sa pagpapakilala sa papel na ito dahil parehong kalagayan ng uri ng problema na Zorn ang pagsusuri ay lubhang malinaw, at din dahil ito ay naglalarawan ng kanyang malinaw na estilo pagsulat ng matematika: