HE is eternal. Which means that He anteaters time and is wholly independent of it. Time began in Him and will end in Him. To it He pays no tribute and from it He suffers no change.
HE is immutable. Which means that He has never changed and can never change in any smallest measure. To change He would need to go from better to worse or from worse to better. He cannot do either, for being perfect He cannot become more perfect, and if He were to become less perfect He would be less than God.
HE is omniscient. Which means that He knows in one free and effortless act all matter, all spirit, all relationships, all events. He has no past and He has no future. He is, and none of the limiting and qualifying terms used of creatures can apply to Him.
- excerpt from The Pursuit of God by A. W. Tozer