It might seem a strange decision for Nielsen to resign this prestigious chair, but he was sixty-five years of age in 1955 and he felt that his international commitments were too much to allow him to do full justice to all his tasks.
Ito ay maaaring tila isang kakaibang desisyon para sa Nielsen sa-resign na ito prestihiyoso chair, ngunit siya ay animnapu-limang taong gulang sa 1955 at nadama niya na ang kanyang international commitments ay masyadong marami upang payagan sa kanya upang gawin ang buong katarungan sa lahat ng kanyang mga gawain.