This quote is a metaphor that speaks to the idea of taking risks and stepping out of comfort zones. While boats are secure when they are in the harbor, their purpose is not to remain docked but to sail the seas. Similarly, humans might feel safe when they are in their comfort zones, but to truly live and fulfill their potential, they need to take risks, challenge themselves, and venture into the unknown.

The harbor represents comfort, predictability, and safety, while the sea stands for the unknown, the challenging, and the risky. The boat, in this case, is a symbol for individuals. While it’s easy to remain where it’s safe and comfortable, it’s not where growth happens. Growth and progress often come from facing challenges, from sailing into the rough seas of life, and navigating through them.

In today’s fast-paced world, this quote is even more relevant. With the rapid changes in technology, economy, and society, sticking to the ‘harbor’ or the known paths might seem safe but can lead to stagnation. To keep up with the changing times, one needs to continuously learn, adapt, and take on new challenges. This could mean learning new skills, switching careers, starting a business, or even moving to a new city or country.

In terms of personal development, it encourages individuals to step out of their comfort zones, face their fears, and take on challenges that they might feel are beyond their capabilities. It could be public speaking, leading a team, or even something as personal as overcoming shyness or social anxiety. The idea is to push oneself, to sail away from the safe harbor, and to learn and grow from the experiences that come with facing and overcoming challenges.

In essence, the quote is a call to action, to embrace change and risk, and to realize that safety and comfort are not the ultimate goals of life, but rather stepping stones to growth and fulfillment.