This quote suggests a strong belief in the power of positive thinking and self-perception. It implies that one’s mindset and attitude towards oneself can significantly impact their financial situation. The author sees himself as "endlessly abundant," meaning he views himself as a person of immense value, full of potential and deserving of wealth. This positive self-perception then manifests in his reality, attracting financial prosperity.

The idea is rooted in the Law of Attraction, a philosophy suggesting that our thoughts and feelings shape our reality. In this case, the author’s belief in his endless abundance attracts corresponding outcomes, i.e., money.

Applying this idea in today’s world or personal development involves cultivating a positive mindset and a strong belief in one’s abilities and worth. It means recognizing and affirming the value that you bring and believing that you are deserving of abundance. This mindset can be fostered through various means, such as affirmations, visualization, and mindfulness practices.

In terms of personal finance, this could translate into making confident investment decisions or negotiating salaries or rates that reflect your true worth. In entrepreneurship, it could mean pricing your products or services appropriately, not undervaluing your work.

In the broader sense, it could also involve contributing to society in meaningful ways, believing in the value of your contributions, and thus attracting wealth. It’s not just about monetary wealth, but also about richness in experiences, relationships, and personal growth.

However, it’s important to note that this philosophy doesn’t negate the need for practical financial management skills, hard work, and a sound understanding of one’s economic context. Positive thinking should be complemented with action and strategy. It’s about aligning one’s mindset, actions, and environment towards achieving financial abundance.