God always was and is and will be!
Before mountains were brought forth
Or You had given birth to earth and world
Even from everlasting to everlasting You are God (Ps 90:2).
“God said to Moses, ‘I AM WHO I AM.’ And He said, “Thus you shall say to the sons of Israel: ‘I AM has sent me to you’” (Exod 3:14)
“‘I am the Alpha and the Omega,” says the Lord God, ‘Who is and Who was and Who is to come, the Almighty’” (Rev 1:8).
His being has always been and will always be exactly what it is.
“Holy, Holy, Holy is the Lord God, the Almighty,
Who was and Who is and Who is to come” (Rev 4:8).
(Spotlight 1, Lesson 2 in Doctrine 101: Learning about God)