"Only the man who disciplines himself strictly can stand for long the terrific pace of modern war"

This quote by William Lyon Mackenzie King speaks with the significance of self-discipline in the face of modern warfare. In the context of war, self-control is essential for soldiers to be able to withstand the physical and mental strain of fight. The "great rate" of modern warfare is a reference to the speed and strength of combat, which can be overwhelming for those who are unprepared. By disciplining oneself, one can establish the psychological and physical perseverance needed to withstand the rigors of war. Self-discipline can also assist soldiers to remain concentrated and arranged in the midst of turmoil, permitting them to make fast decisions and remain calm under pressure. In other words, this quote is a pointer that self-control is a key factor in having the ability to make it through and be successful in modern warfare.