The idea of eternity lives in all of us. We thirst to live in a belief which raises our small personality to a higher coherence - a coherence which is human and yet superhuman, absolute and yet steadily growing and developing, ideal and yet real.

His daughter Thora was a history and language teacher from 1938 at Oslo Cathedral School. During the occupation of Norway by Nazi Germany Christian Lous Lange joined the resistance movement while her husband went in exile. He was one of the world's foremost exponents of the theory and practice of internationalism.

He was the father of Carl Viggo Manthey Lange Halvard Lange and Christian August Manthey Lange. Lange died at the age of 69 one day after the 17th anniversary of his receipt of the Nobel Prize.