I can provide you with some insights into the views of physicists regarding the concept of time and its relation to modern-day spiritualists who claim that "time isn't real."
In the realm of modern physics, particularly in the fields of theoretical physics and cosmology, the nature of time is a subject of ongoing debate and exploration. Physicists do not all have a single consensus on the fundamental nature of time. Some theories suggest that time might not be as straightforward as it appears in our everyday experiences.
One perspective comes from Einstein's theory of general relativity, which has been extraordinarily successful in explaining the nature of gravity and spacetime. According to general relativity, space and time are interconnected in what is known as the fabric of spacetime. Time is considered the fourth dimension, and it is influenced by gravity and the presence of mass and energy.
In this framework, time is relative, meaning its flow can be experienced differently for different observers depending on their relative motion and gravitational fields. This concept of time dilation has been experimentally confirmed and is one of the key aspects of modern physics.
Some interpretations of quantum mechanics and theories like loop quantum gravity and other approaches to quantum gravity also suggest that time might not be a fundamental concept at the most fundamental scales of reality. Some physicists explore the possibility that time might emerge from more fundamental processes.
Regarding spiritualists or others who claim "time isn't real," they might be drawing on philosophical or metaphysical perspectives rather than the scientific concepts of time. Some spiritual traditions propose that the true nature of reality transcends our everyday experiences, and concepts like time might be illusions or constructs of our limited perception.
It's essential to recognize that while physics aims to describe the natural world and its phenomena through empirical and mathematical means, spirituality often explores questions related to existence, consciousness, and the nature of reality using different methodologies.
As with any complex topic, the intersection of science and spirituality can lead to diverse opinions and interpretations. It's crucial to engage in open and respectful discussions to better understand different viewpoints and their implications. Both scientific and spiritual perspectives have contributed to humanity's understanding of the universe and our place in it.