I love Barclay’s thoughts on The eternality of God:
Now let us take eternal life. It is far better to speak of eternal life than to speak of everlasting life. The main idea behind eternal life is not simply that of duration. It is quite clear that a life which went on for ever could just as easily be hell as heaven. The idea behind eternal life is the idea of a certain quality of life. What kind? There is only one person who can properly be described by this adjective eternal (aionios, Greek #166) and that one person is God. Eternal life is the kind of life that God lives; it is God’s life. To enter into eternal life is to enter into possession of that kind of life which is the life of God. It is to be lifted up above merely human, transient things into that joy and peace which belong only to God. Clearly a man can enter into this close fellowship with God only when he renders to him that love, that reverence, that devotion, that obedience which truly bring him into fellowship with him.