"And time itself? Time was a never-ending medium that stretched into the future and the past - except there was no future and no past, but an infinite number of brackets, extending either way, each bracket enclosing its single phase of the Universe"

Clifford D. Simak's quote explores the philosophical and abstract nature of time, challenging the standard direct perception that people generally run with. At its core, the quote recommends that time is not a straight line case from past to future, but rather a boundless area, making up an "infinite number of brackets". Each of these brackets represents an unique stage or minute of the universe, encapsulating its own distinct reality.

This concept invites reflection on the fluidity and non-linear structure of time, challenging our habitual understanding. The concept that there is "no future and no past" indicates that these sectors or brackets exist together at the same time, potentially resonating with theories in contemporary physics, such as the block universe theory. This theory proposes that past, present, and future all exist together in a four-dimensional space-time block, and our perception of time is simply a navigational experience through this block.

Simak's portrayal of time as "a never-ending medium" indicates its eternality and constancy, a large canvas on which deep space paints its several stages. By deconstructing the concept of linear progression, Simak motivates a view of time that is more spatial and interconnected, where each minute is both distinct and part of a bigger continuum. This can stimulate both a sense of marvel and existential reflection on the nature of our reality and existence.

In addition, the imagery of "brackets" confining each phase suggests a separation and individuality of moments, hinting at the idea that while these minutes belong to a larger tapestry, they retain their own identity and significance. This can be analyzed as a reflection on the uniqueness of every moment or stage of deep space, highlighting that while time is infinite, every instance within it has its intrinsic value and contribution to the whole.

In essence, Simak's quote triggers a profound meditation on the measurements and essence of time, welcoming one to reassess not just how we perceive time however how we exist within it, urging a gratitude for the present moment's place in the ever-expanding continuum of the universe.