"The material, sensuously perceptible world to which we ourselves belong is the only reality.... Our consciousness and thinking, however supra-sensuous they may seem, are the product of a material, bodily organ, the brain. Matter is not a product of mind, but mind itself is merely the highest product of matter." — Karl Marx
things conform to law, regardless of the subjects awareness of it, we should strive to learn the laws that govern the universe and leave behind obsolete idealism. Modern science has done a lot uncovering how our brain works and the complex processes behind conciousness, at this point arguing for conciousness as something separate is like arguing that rain is caused by deities.