. . . we are eternal beings within An Eternal Being.

In John 8:58, Jesus calls Himself "I Am" (Eimi). I Am is the name of God in the Hebrew Scriptures (Exodus 3:14). He exists eternally, in the present tense forever. In grammar, "I am" is called the first person singular of the verb "to be".

In Acts 17:28 we read, "In Him we live and move and have our being;". What is translated as "have our being", in the Greek it is "Esmen" which means "we are". In grammar, "we are" is called the first person plural of the verb "to be". In Greek it is easy to conclude that, "In I AM. . . we are". We are eternal beings in existence within An Eternal Being.

In the Greek, Acts 17:28 is making the point that we are a plurality of eternal beings which have our existence within A Greater Singular Eternal Being. Made in the image of God, we too are eternal beings, like God, just smaller and a part of a plurality.