Correct.  God is not mortal.  He is spirit with invisible attributes:

"God is spirit, and those who worship Him must worship in spirit and truth." John 4:24 (NAS)

"Now to the King eternal, immortal, invisible, the only God, be honor and glory forever and ever. Amen." 1 Timothy 1:17 (NAS)

"For since the creation of the world His invisible attributes, His eternal power and divine nature, have been clearly seen, being understood through what has been made, so that they are without excuse." Romans 1:20 (NAS)

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