Man cannot live by bread alone… he must have peanut butter” is a humorous twist on a well-known biblical phrase that emphasizes the importance of spiritual nourishment in addition to physical sustenance. The original phrase “Man cannot live by bread alone” is used to convey that human beings need more than just physical necessities to truly live, such as emotional, intellectual, and spiritual fulfillment.

In this quote, the addition of “he must have peanut butter” is a metaphorical way of suggesting that life is not just about fulfilling basic needs. Peanut butter, in this context, represents the added extras in life, the things that make life enjoyable, exciting, and worth living. It could represent anything from love, hobbies, passion, to intellectual stimulation, and personal growth.

Applying this idea to today’s world or personal development, it’s a reminder that while it’s important to meet our basic needs (the ‘bread’), it’s equally important to seek out and enjoy the things that bring us joy and fulfillment (the ‘peanut butter’). In the hustle and bustle of modern life, it’s easy to get caught up in the rat race, focusing solely on survival or material success. However, this quote reminds us that to lead a truly fulfilling and balanced life, we need to also focus on personal growth, relationships, passions, and mental health.

For instance, one may have a well-paying job (the bread), but if they are not passionate about what they do or if their work-life balance is skewed, they may not feel fulfilled. They need to find their ‘peanut butter’ – it could be spending time with loved ones, pursuing a hobby, or contributing to a cause they care about. This balance between ‘bread’ and ‘peanut butter’ is what leads to a well-rounded, satisfying life.

In essence, the quote is a call to not just survive, but to thrive by incorporating elements in life that provide more than just physical sustenance.