Then John (the Baptist) testified, I saw the spirit come down from heaven as a dove and remain on him. I would not have known him except that the one who sent me to baptize with water told me, The man on whom you see the spirit come down and remain is he who will baptize with the Holy spirit. I have seen and I testify that this is the son of God.

John 1:32-34

This is an introduction to the Trinity presented individually although they are three in one. They are still actively at work in the world and in us. You will have your questions answered at last!