This quote by Pierre Corneille suggests that war is a needed part of attaining peace. It suggests that war is a needed evil, which it is just through dispute that peace can be attained. This idea is typically described as the "balance of power" theory, which recommends that peace is only possible when 2 or more forces are in balance. This balance of power can just be attained through war, as it is the only way to ensure that no one side has too much power. This quote also suggests that peace is not a natural state, however rather something that needs to be actively pursued and kept. War is a necessary part of this procedure, as it is the only way to ensure that peace is maintained. Ultimately, this quote recommends that war is a necessary part of accomplishing peace, which peace is only possible through conflict.
"When the principles that run against your deepest convictions begin to win the day, then the battle is your calling, and peace has become sin. You must at the price of dearest peace lay your convictions bare before friend and enemy with all the fire of your faith"
