From 1921 to 1926, he received education at Fjellhaug utdanningssenter in Oslo, a missionary school affiliated with the Norwegian Lutheran Mission.
Aavik married Ragna Torgersen (1906–1984) in 1932 and later moved to the Yunyang northwestern mission area.
The Norwegian missionaries would later temporarily and definitely leave this field because of World War II and the subsequent communist advance.
Aavik still came back to the Republic of China, now Taiwan, where he worked with less interruption from 1952 to 1970.
His work consisted partly in teaching at a Bible school at Kaohsiung and at the Lutheran Theological Seminary in Taipei and Taichung.