The Problem With the Philosophy of Psychedelics

We know nothing but our mode of perceiving them, a mode which is peculiar to us. Even if we could bring our intuition to the highest degree of clearness, we should not thereby come any nearer to the constitution of objects in themselves. There's never really any clarifiable proof that you've done that because everything you're assessing is still done from your subjective apparatus. It's from your sensibility. From this, then we can understand that even though the conditions of our reality are understood as space and time a priori, we can't assert that these conditions apply universally to the Constitution of things in themselves.