How can be Trinity Eternal?

It's said in *Summa Theologica* that the trinity ist eternal, three persons each one being G'd a well known fact in Christianism. I'd like to know, what is the greek explanation or the following (**Matthew 28:19**) and if it was very changed (by translation): > Go therefore and make disciples of all nations, baptizing them in the > name of the **Father** and of the **Son** and of the **Holy Spirit**, (ESV) And we see a distinction amongst three words, why this happens if indeed G'd is One, and why would it be that they would be G'd if G'd is **One**, Aquinas says that He is one times one times one, this is, He isn't three as a number, but I'd like to point out that even though this seems true, isn't there a dialectic thinking in this? And in **Ephesians 4:6** the following, just as a reflection: > One God and Father of all, who is over all and through all and in all. More, I'd like to add the following: *if G'd is One, then isn't everything and everyone G'd? For if they weren't Him, then He wouldn't be One (the contrapositive)*, then if this stands, meaning that there is just Him, why is there a perception of evil which isn't Him? *obs.: the title is called if trinity is eternal as a way to say if it's the reality that trinity attempts to explain or G'd He Himself in an absolute manner*