This quote, "Avoid the precepts of those thinkers whose reasoning is not confirmed by experience," essentially advises us to be cautious of theories or ideas that are not backed by practical experience or empirical evidence. In other words, it suggests that we should value knowledge that is grounded in reality and tested through experience, rather than those based solely on abstract thought or speculation.

This advice is rooted in the belief that experience is a critical component of knowledge and understanding. It suggests that the most reliable and valuable insights come from those who have not only thought deeply about a subject, but have also engaged with it in a practical, experiential manner.

Applying this idea in today’s world, we might think about the vast amount of information and opinions we encounter daily on the internet. It’s easy to find people offering advice or expressing ideas on a myriad of topics. However, this quote would encourage us to critically evaluate the source of that information. Has the person offering advice on starting a business, for example, actually run a successful business themselves? If not, their advice may not be as valuable or reliable as they claim.

In terms of personal development, this quote might encourage us to seek out mentors and guides who have practical experience in the areas we wish to grow. If we want to become better communicators, for example, we should look to those who have demonstrated their communication skills in real-world settings, rather than those who simply theorize about communication.

Overall, the quote advocates for a grounded, pragmatic approach to knowledge and learning. It champions the idea that experience is a vital teacher and that theories or ideas should be tested against the realities of the world before they are accepted as truth.