They who dream by day are cognizant of many things which escape those who dream only by night.

In this quote, Edgar Allan Poe reflects on the nature of dreaming and its connection to awareness and insight. He suggests that those who dream by day, meaning those who are constantly engaged in visionary thinking or active imagination, are more likely to perceive things that others may miss. In contrast, those who only dream at night, or who passively imagine things in their sleep, may be less aware of the subtleties and opportunities that exist around them.

Poe’s statement implies that daydreamers—those who consciously allow their thoughts to wander and explore ideas—are more attuned to a deeper level of understanding. They can draw connections, recognize patterns, and uncover insights that might escape people who do not actively engage in such reflective or creative thought during their waking hours. The daydreamer’s mind is open to new possibilities and can see beyond the immediate, while those who sleep through the night may only process their dreams passively.

The quote also speaks to the value of active imagination and how it enhances one's ability to innovate and explore new ideas. Daydreaming is often seen as a form of creative thinking that can inspire art, invention, and problem-solving. Poe is suggesting that through this active, imaginative process, individuals are more likely to notice and understand the deeper truths that might otherwise go unnoticed in everyday life.

Ultimately, Poe’s quote emphasizes the importance of allowing one’s mind to wander and dream while awake, as it enables a deeper level of awareness and discovery. It highlights how imagination and reflection in both waking and sleeping states can enrich one’s understanding of the world and contribute to a more profound connection with reality.