My Answer: Suppose I want to explain quantum physics to a little child. I will have to begin the explanation from the simplest things and the most basic laws. And it will take many years for the child to learn all the formulas and definitions. We advance in the science of Kabbalah in the same manner, step by step, gradually moving through the degrees of the worlds, which are concealments that hide that which can harm us for the time being. Layer by layer, we reveal what is to our benefit to the extent that we are able to learn it.
It is impossible to enter the spiritual world without knowing its laws, just like in our world we could not survive without knowing the laws of this world. In fact, we are taught about the laws of this world for the first 15-20 years of our lives. Likewise, a person can only enter the spiritual world once he has all the necessary knowledge about the soul’s existence in it.
This is why there is a period of preparation, which we are now going through. The next stage of our development will be revealed to us as soon as we are ready for it.
Therefore, when we feel bad all of a sudden, when we experience difficulties and feel like we don’t understand things, when we are overcome by “darkness” and disappointment, we have to see this as help from Above. Like children, we should rejoice about the game that the “Adult” is playing with us.
Each person is bound to attain the Upper World in this life. All we have to do is go through the right preparation to be able to feel it and live in it.