All arguments that reality is entirely subjective are ultimately self-contradictory - for if all thoughts are subjective, then the thought that all thoughts are subjective is itself subjective, not based on objective reality, and therefore, not an objectively true (ie, congruent with objective reality) statement. But if it is not an objectively true statement, then some thoughts aren't subjective - and reality can be known. But if it IS an objectively true statement, then we can make objectively true statements and have objectively true thoughts.
Yes, we color what is objectively real with our feelings, our experiences, our interpretations. Yet with practice, we can detach from all the things that color pure awareness, pure consciousness. We can step back from the chaos of our thoughts, and experience the silent observer, the underlying program beneath the subroutines of thought, the primary layer of awareness. When we do so, we experience reality - albeit a reduced reality, limited by the medium of human flesh and the capacity of our brains. Yet a small amount of ocean is still ocean, and so we can know reality, though not in it's entirety.
This is what fascinates me so much about hallucinogens - the ability to open up the gateway a bit more, and experience more of objective reality. While I believe we can know objective truth, I do not think we can know objective truth in it's entirety, any more than a chimp could understand quantum physics. A chimp perceives reality at the level of his capacity, and so can we. We humans are distinct, in that we can expand that capacity. Still, there are limits. As we progress and evolve over millions, billions and trillions of years into the future, our capacity for understanding levels of reality simply beyond our current physiology will of course increase.
In the end, as life populates the entire Universe, creating a universal Biosphere, I believe life will take control of the future evolution of the cosmos itself. I think to a certain extent this is inevitable - that the future that will be is able to effect a future-to-past causality, directing evolution to the desired end from the beginning. Causality is only from past-to-present from the perspective of those bound by time. Once time itself become another navigable dimension, there are no barriers to causation from what we call the future.
Turn off your mind, relax and float down stream
It is not dying...It is not dying
Lay down all thought; Surrender to the void
It is shining...It is shining...
RealAwareness