illustration (attribution, if any possible, is at the end of the article)
This doesn't imply the world out there doesn't exist, isn't real, or is a mere illusion / creation from my mind; it just limits the understanding I may have of it, in conventional life.
As long as I don't get out of thoughts conditioned by stimuli (the 5 khandas) to apprehend / cognise the world, I cannot get out of my individual experience, tainted by the conditions that led me to this instant, tainted by memory of previous experiences, tainted by associations from previous experiences... Even when debating theories with other people, I have an individual interpretation of what is exchanged, so it is not objective even when my interlocutors and I "agree." No matter how much we agree, we'll still act differently afterwards, and do something different from the "shared" information...
"To see things as they are" requires us to let go of individuality, to realise the emptiness of it, to realise its stimuli-conditioned nature and to let go of the taints accumulated during the process that led us here and now.