This quote metaphorically compares the human brain to a radio crystal, emphasizing the adaptability and selective attentiveness of our minds. Just as a radio crystal can be adjusted to pick up different frequencies, our brains have the remarkable ability to focus on various thoughts, ideas, and perspectives. This analogy highlights the power of mindset and conscious focus, suggesting that what we 'tune into' mentally can shape our perception of reality and the outcomes we experience.

The implication here is profound: we are not passive receivers of information but active selectors. By intentionally tuning our mental frequency, we can change our approach to challenges, opportunities, and interactions. It also speaks to the importance of mental flexibility — the ability to shift our focus and mindset to resonate with the appropriate 'frequency' needed in different situations. This flexibility can impact creativity, problem-solving, emotional intelligence, and personal growth.

In the context of Chris Prentiss' book "Be Who You Want, Have What You Want: Change Your Thinking, Change Your Life," this quote reinforces the book’s core messages around the power of thought and mental reconditioning. It reminds us that by consciously adjusting our thoughts, we can influence the reality we experience and transform our lives. The brain's tuning is a dynamic process — a reminder to be mindful of what we pay attention to and nurture internally.

Ultimately, this metaphor invites us to take control over our mental landscapes, recognize the power of our focus, and embrace mental agility as a tool for personal empowerment and change.