God is the air we breath. Without God we would truly die, not only because he supplies the air we breath, but due to the fact that he gives or denies all our other necessities according to his will. Like electricity gives the computer the energy to function, so too does the spirit give to living creatures. Cut off the electric supply from the computer, the machine shuts down, put back on the power supply the computer with all it functions is active again. Both written and spoken words carry spirits, because they carry the thoughts and feelings from a mans mental disposition, which come from the brain.
Thoughts work like wind, in that they can t be seen.
A mind-set may be expressed by spoken or written words, but can t be seen in the head, but only in a certain arena of expression. So one brain can effect another by harsh words, or a harsh look, or a harsh thought, and even in feelings sensed. Thoughts and feelings cannot been seen, actively in a brain, even under any microscopic lens, but all thoughts are generated in the brain. So God is also a spirit, in all the descriptions found above and also in relation to his mental disposition. God is all Mind, because he is expressed in his mind, which is unseen, but can be manifested in the natural arena of sight etc., also in all his creation and his recorded words.