Question: How should I experience all of the Kabbalistic terms that we study in Talmud Eser Sefirot, for example, NHY and Nefesh?
Answer: When you attain the spiritual world, you will feel the Light that is called NHY or the Light of Nefesh. You will feel it! And then you will also understand what Kabbalists write.
This is called, “a person’s soul will teach him.” You will feel it, and from your sensation you will also understand what it is called. It’s like you find yourself in an unknown city where you look at some buildings that cannot be recognized from the outside, and you say, “This is a theater that was built 300 years ago. And that’s a museum.” Thus, you describe everything you see. As you recognize things, you reveal their names, their essence, and absolutely everything.
This is called spiritual attainment and it means that a person’s soul teaches him. It’s as if there is an instructor inside of you who teaches you. This is your soul. That’s because you tune into the same sources. Where did Kabbalists get this knowledge from? Only from their attainment. Where did Adam HaRishon get it from, being the first person who attained spirituality? He revealed his inner world, the spiritual world.
This is not an imaginary world that appears as our world in this external shell of our body. When we enter inside, we see the spiritual world. There, Adam revealed everything and he began calling all the parts of reality by different names. He gave them names. That is how you will also know what every element of the spiritual world is called.
From the lesson on 3/25/11, Talmud Eser Sefirot