A typically Jesuit theme involves the reality of struggle in the Christian life. Something that requires the soldiery of a saint like Ignatius. Chapter Five will carry us through the themes of spiritual combat, vigilance, and the all-important discernment.
158. The Christian life is a constant battle. We need strength and courage to withstand the temptations of the devil and to proclaim the Gospel. This battle is sweet, for it allows us to rejoice each time the Lord triumphs in our lives.
Ignatius was a soldier, so he understood the striving for holiness in terms of battle. We look for familiar strains in the unfamiliar. Other non-military traditions are not ignorant of what a struggle the Christian life can propose for us in our lives. As a pacifist-leaning Christian I can appreciate the concepts given here, even if I don’t need to take them into open warfare.