After military service in the
First World War, Lilje studied Protestant theology and art history in Göttingen and Leipzig. He was ordained in 1924, served as a student pastor in Hanover from 1925 to 1927, and then became general secretary of the
Deutsche Christliche Studentenvereinigung (German Christian Student Association). Before 1933, Lilje viewed National Socialism with clear political sympathy. In 1931/32 he wrote that National Socialist participation in government was to be expected and added,
"Die Frage, ob das wünschenswert ist, ist mit Ja zu beantworten."(“The question of whether that is desirable must be answered in the affirmative.”) In 1933 he welcomed the political upheaval as a
"new German morning" and linked it to hopes of national and Christian renewal. Lilje later became one of the founders of the
Jungreformatorische Bewegung, which opposed the church-political programme of the
German Christians. The movement, however, did not represent a fundamental rejection of National Socialism: contemporary documentation describes it as opposing the German Christians while also affirming the
"new German state" and sharing anti-liberal positions. Lilje's conflict with the Nazi regime thus developed primarily over the regime's attempt to subordinate the Protestant churches, not as an early comprehensive rejection of National Socialism as such. Later scholarship has described his criticism of the Nazi state and ideology as limited, even while he was active in church opposition circles. This ambivalence remained visible during the war. In 1941 Lilje published
Der Krieg als geistige Leistung, a text that gave religious meaning to military sacrifice; one of its best-known lines states,
"Mit Gott! Nur im Namen Gottes kann man dies Opfer legitimieren." (“With God! Only in the name of God can one legitimize this sacrifice.”) In 1944 Lilje was arrested after the failed
20 July plot because of contacts to members of the resistance milieu. He remained in Gestapo custody until the end of the war. == Post-war role ==