why can't the spirtual experience explained from logic

I have heard that when a meditators do a very deep meditation and experiences supernatural phonomenon that experience can't be expressed with words and logic. What does that mean. I remember Albert Einstin said: if a person can't explain something he hasn't understood it, doesn't this thing also apply to the spirtual experience. If the yogi or person who has experience rebirth and multiverse can't explain it properly, and is saying just based on his vision acquired though deep meditation like seeing past lives, future, past, travelling to other infinite universe. Than although they are all actually happening and real wouldn't their be void or incompletness in his/her knowledge of such things? How can we consider them as perfect truth? And also, if past, future and present are just illusion than why do we feel it? And why can't people expalain scientifically all the supernatural experiece they gain from deep meditation. Are other multiverse made of possible past and possible future? What are similaritys between Schrodingers cat theory and multiverse accordig to spirtual path? Although i know little bit i want to understand more form here. I have heard that conciousness pops up like an electron i.e conciousness is not a continious phenomenon from a buddhist monk(i forgot his name and video), like a subatomic partical which dissaperas and appera in another place, what does this mean?