Answer: What this expression is saying is that we perceive the world through our senses. Certainly if without glasses I see one thing, when I put them on, I see everything differently.
This world is felt within us, and according to how I set myself, like a musical instrument, I perceive, classify, and evaluate it. And this determines my attitude towards it. So I look at the world through my personal glasses, and if they are changed for me, this means that my internal orientation is changed, so I see another world.
The wisdom of Kabbalah directs a person towards a perception of the entire nature in which we exist, not only for this brief present time, but beyond it. It reveals to us the entire process through which we are passing, not only within a physical body but also in other emanations.
From an Interview on RTN, New York, 7/21/15