The Creator created only one state called the “World of Infinity.” All the changes taking place occur solely within us, and although we exist in the World of Infinity, we perceive only ourselves.
Once, in my perception, I was unified with all the souls and perceived the World of Infinity as boundlessness, eternity, and perfection. Then, my condition and perception changed, and I started to feel that I exist in a dark, defected world full of pain, problems, disorder, pressure, and restrictions. I felt worse and worse until I reached the lowest degree where I found myself in this world, the surrounding reality, together with other people similar to me.
All of this happened exclusively within me, in my subjective perception of reality. Outside of me nothing changed. It is as if by removing my glasses, I see nothing outside of me, but as soon as I put them back on, I begin to perceive another world. This is how our properties changed from the degree of the World of Infinity to the degree where we perceive only our world that has nothing of the World of Infinity.
However, we can return to the state called “the World of Infinity” where all exists in the ultimate harmony, eternity, and perfection, and where the Light, that is, “Good that Does Good,” dwells. How can we achieve it? We have to attain the perception of this state by awakening it in ourselves. The World of Infinity is hidden within us behind numerous layers of concealment. Gradually, by moving from a greater to a lesser concealment, we discover the World of Infinity.
The stages we undergo while coming back to awareness of Infinity are called the worlds or concealments ("world" — "Olam" comes from concealment — "Olama"). Eventually, the concealment disappears and we rise above it. This is what it means to ascend the degrees of the spiritual ladder, the degrees of the worlds, and to rise above the concealment to perceiving increasingly more.
How do we do that? We evoke a state called the “World of Infinity” by reading The Zohar together. This Book describes our connection with the World of Infinity, and it arouses that desire within us.
From the 3rd part of the Daily Kabbalah Lesson 7/2/10, The Zohar