In Galatians 4:6, we can clearly see about the Holy Trinity.
Notice it says that God the Father sent the Spirit of his Son Jesus, into our hearts, which shows that Jesus is omnipresent as God the Father is, and that is another verse, which shows that Jesus is God, being omnipresent.
Also it says, that the Spirit of his Son cries out “Abba Father”.
The Spirit of Jesus in us communicates with God the Father, through us, by being in us.
He does it by using us, and it is not just us crying “Abba Fatter”. Awesome!
Glory and thanks be to our Lord Jesus Christ for that!