As-Salaam alaikum,
In ayat 85 of Surat Bani-Isra'el of the Holy Qur'an (17:85), Allah Ta'ala says:--

"And they ask you concerning the Ruh (spirit or soul).
Say: The Ruh (comes) by command of my Lord: of knowledge
it is a little that is communicated to you, (O men)."

With this ayat, we come to understand that the Ruh.... the spirit or soul in our body is one of those things that are of high spiritual mysteries, which cannot be explained in terms of our everyday human experiences. It is Allah's secret ocean... an ocean from which you and I are able to look, taste, smell, speak, touch, hear, hold, feel and walk.

How is it that we are able to do all this, but yet we do not know how we are looking, hearing, tasting, speaking, smelling and walking ? You may lift your hand up and let it fall down again, you may catch something, but you do not know how you are catching that thing. You are walking, but you don't know how you are able to walk.

Looking into ourselves, we see a perfect balance. There are 360 organs (internal and external) in our bodies... each has its own function and none stops the other from working. So, it is not possible for you/us to understand about Ruh more than this... other than to acknowledge and say: Allahu akbar! Allahu akbar!! La-ilaha illallahu, Allahu Akbar, Wa-Lillahil Hamd!!!