The quote "War…is harmful, not only to the conquered but to the conqueror," suggests that the act of war, regardless of victory or defeat, brings harm to all parties involved. This harm is not just physical, but also emotional, psychological, and economic.

Physically, war leads to the loss of lives and destruction of infrastructure on both sides. The victor, although not conquered, still suffers the loss of soldiers and resources. Emotionally and psychologically, the trauma of war can have lasting effects on the mental health of those involved, leading to post-traumatic stress disorder (PTSD), depression, and other mental health issues. Economically, war can be a significant drain on a country’s resources, diverting funds from other important areas like education, healthcare, and social services.

In a broader sense, this quote underscores the idea that violence and aggression, no matter how seemingly justified, ultimately lead to negative consequences for all involved. This is a principle that can be applied not just to nations, but also to individuals and communities.

In today’s world, this concept could be applied to conflicts between countries, but also to more localized disputes, such as political disagreements, corporate rivalry, or even personal feuds. For example, in a bitter corporate rivalry, both companies may suffer – they may spend so much time, energy, and resources trying to outdo each other that they neglect their own growth and development.

In terms of personal development, this quote could be a reminder of the harm that can come from engaging in conflicts, whether they’re interpersonal or internal. For instance, holding onto anger or resentment can be mentally and emotionally damaging, even if it feels justified. Similarly, constantly battling with oneself – for example, through self-criticism or self-doubt – can hinder personal growth and happiness.

In conclusion, this quote serves as a powerful reminder of the destructive nature of conflict and war, whether on a large scale between nations or on a smaller scale between individuals or within oneself. It suggests that peace, cooperation, and understanding are not just morally preferable, but also more beneficial for everyone involved.