"Perfect as the wing of a bird may be, it will never enable the bird to fly if unsupported by the air. Facts are the air of science. Without them a man of science can never rise"

In this thought-provoking quote, Ivan Pavlov draws an analogy between a bird's wing and scientific questions to highlight the indispensable role of realities in the world of science. The images of a bird's wing, described as best, evokes a sense of inherent capability and capacity. However, Pavlov explains that in spite of its excellence, the wing alone is inadequate for flight without the necessary support of the air. In this metaphor, the wing represents the human intelligence or clinical theories, filled with potential for understanding and discovery. However, without the "air"-- which in this context symbolizes facts or empirical proof-- these ideas can not really take flight.

Pavlov's assertion highlights that truths are fundamental to science, similar to air is to a bird in flight. Science is not simply a collection of stylish theories or hypotheses but is grounded in factual evidence that validates and supports these concepts. Simply as a bird requires air to soar, scientists rely on realities to elevate their theories from mere speculation to established knowledge. This is a tip of the empirical nature of science-- a venture to not just envision or theorize however to rigorously check and validate through observation and experimentation.

In addition, Pavlov's quote functions as a care to those who may rely too heavily on theoretical constructs without subjecting them to empirical examination. It highlights the threat of ending up being separated from the accurate basis that genuinely empowers scientific progress. Without a company grounding in evidence, even the most magnificently built theories remain unvalidated, similar to a wing without air.

In essence, Pavlov is promoting a balanced approach to science that honors both intellectual imagination and empirical rigor. His message strengthens the idea that true scientific advancement comes from the harmonious interaction between innovative thinking and strong, fact-based evidence.