Here is John 1: 1-5 1 In the beginning was the Word, and the Word was with God, and the Word was God. 2 He was with God in the beginning. 3 Through him all things were made; without him nothing was made that has been made. 4 In him was life, and that life was the light of all mankind. 5 The light shines in the darkness, and the darkness has not overcome it.
No where does this describe how you can have two (or three) non generated eternal infinite beings.
There are a lot of things that the bible does not describe.