Moltmann's Ethics of Hope

In the theology reading group [the Volfians] our next book is Ethics of Hope by Jurgen Moltmann. In the Preface he states

The principle behind this ethics of hope is:  

—not to turn swords into Christian swords 

—not to retreat from the swords to the ploughshares 

—but to make ploughshares out of swords.

Swords to ploughshares is an allusion to Isaiah 2:4.

This statue Let us beat swords into ploughshares is found in the gardens of the United Nations in New York and was (ironically?!) a gift from the Soviet Union in 1959.