What do you know through direct experience. Ask yourself, what's the difference between knowing something and believing something? Absolute , eternal truth is unchanging. Through observation of the days of your life, it's evident that everthing changes. The only thing that doesn't change, is the consciousness that's aware of change. So what do we really know for absolute besides consciousness, that we're hungry, tired, have to go to the bathroom... It's the ego insisting that we know (telling us we'll be less if we don't), we don't know... The great news is we're all in the same boat!