This quote is essentially saying that evolution, like gravity, is not a matter of belief but a scientific fact. Just as we don’t question the existence of gravity because we can directly observe its effects, we should not question the existence of evolution, which has been extensively documented and supported by scientific evidence.

The concept of evolution is based on the idea that species change over time, with traits that enhance survival and reproduction becoming more common in successive generations. This process, known as natural selection, has been observed in numerous species and is supported by a wealth of fossil and genetic evidence.

Gravity, similarly, is an observable phenomenon that is universally accepted as a fundamental principle of physics. We see its effects every day, and it is integral to our understanding of the universe.

In both cases, belief is not a factor. These are not concepts that one can choose to accept or reject based on personal preference or belief. They are factual realities, grounded in empirical evidence and scientific understanding.

Applying this idea to today’s world or personal development, it underscores the importance of basing our beliefs and actions on evidence rather than personal biases or preconceived notions. Just as we accept gravity and evolution as facts, we should strive to make decisions and form opinions based on factual evidence.

In a broader sense, it also speaks to the importance of scientific literacy and critical thinking. In an era of misinformation and ‘fake news’, the ability to distinguish between fact and opinion, and to understand and evaluate scientific evidence, is more important than ever.

In terms of personal development, this quote could inspire us to be more open-minded and willing to question our beliefs. Just as scientific understanding evolves over time, so too should our personal beliefs and understandings. We should be willing to change our views in light of new evidence, and to continually seek out knowledge and understanding.

In conclusion, this quote is a powerful reminder of the importance of evidence-based thinking, both in our understanding of the natural world and in our personal and societal decision-making.