How can we know things?
This is a question of epistemology, historically evolving to be based more and more on direct observation and perception rather than previously with metaphysical frameworks and laws accompanied by unchanging mental realities and truths perceived in the mind immaterially or even materially yet not externally.
Some are more sensitive than others to the sun, to the cold, to disease, to their bodies. One may feel more emotions than others, more heat upon their skin, more cold within their blood, more sensitive to their organs, more in tune with their somatic senses.
Therefore, these humans have more observations than those who look merely at the material or more occupied with mental phenomena, turning great ideas over and over and thinking through plans and equations and even how to achieve their goals.
In the same way, one may be more sensitive to the heat of the sun, one may also be more sensitive to that which is responsible for our existence, the existence of all things, namely God.
There are those who are more in tune with existence, a physical and nonphysical subtance - reality itself. There are those who are more in tune with their breath, calm or shortened.
Therefore, these are not merely subjective experiences, but confirmed by the understanding that humans are variegated in their biological sensitivities.
This is the groundwork of observational discovery of truth.
Let us leave the beloved philosophy of metaphysical logic and laws behind and allow our direct observations to dictate our knowledge of reality. Rather than going back to the former days, we may precede deeper, knowing fully that mankind's ability to perceive has not yet been included in the epistemology of our time. Rather it has been blunted and stifled by logical positivism and the misunderstanding, misconstruing, and choking hold of the arms of contemporaries.
It is not me, myself, and I, and my perception. However, it may begin that way as all explorations into foreign lands, space beyond, and new planets are commenced by a brave settler or rather a pioneer sailing through the winds and seas. But rather, it is the beginning of a new observational philosophy that expands epistemological range to open and to free mankind to make the observations they may make individually and collectively. And when made, shared, and known, transform our lives, our knowledge of the world, to include more truth than before.