This quote is a testament to Nietzsche’s philosophy of life, which often praises struggle, suffering, and the process of overcoming. The phrase “those who do not know how to live, except by going under” refers to individuals who are constantly grappling with difficulties and challenges. These are not people who live life in a comfortable or complacent manner, but rather those who are always in the throes of struggle, always “going under.”

The second part of the quote, “for they are those who cross over,” signifies the transformative power of struggle. Nietzsche believes that it is through facing and overcoming adversity that individuals truly grow and evolve. This crossing over is not simply moving from one state to another, but rather a profound transformation, a rebirth that is only possible through struggle and hardship.

Applying this idea to today’s world or personal development, it suggests that we should not shy away from challenges or difficulties. Instead, we should embrace them as opportunities for growth and transformation. In the face of adversity, we have the chance to learn, to adapt, and to become stronger. This concept aligns with the modern idea of “resilience” or “grit” – the ability to bounce back from adversity, which is increasingly seen as a key factor in personal and professional success.

In personal development, this quote can be a reminder that struggle is not necessarily a bad thing. It is through the process of going under and crossing over that we truly learn about ourselves, develop our strengths, and build our character. Rather than seeking a life of comfort and ease, we should seek a life of challenge and growth. This philosophy encourages a proactive approach to life, where challenges are not just to be overcome, but to be sought out and embraced as opportunities for personal development.