This quote suggests that a philosopher does not strictly belong to any specific school of thought or ideology. Rather, they are free thinkers who explore and question all ideas without prejudice or bias. This intellectual independence is what defines them as philosophers. They are not bound by the constraints of a particular community of ideas, allowing them to think critically and objectively, and to challenge established norms and beliefs.

Applying this concept to today’s world, it encourages us to break free from the confines of our own ‘communities of ideas’, which could be our social circles, political affiliations, or cultural backgrounds. It prompts us to question, explore, and understand different perspectives instead of simply accepting the ideas and beliefs that we’ve been brought up with or that are popular in our communities.

In terms of personal development, this quote could be perceived as a call for intellectual independence and open-mindedness. It encourages us to think critically, to constantly question our beliefs and assumptions, and to be willing to change our minds in the face of new evidence. It reminds us that growth and learning often come from stepping outside our comfort zones and exploring new ideas and perspectives.