'Holy Spirit' in the Bible

I myself did not know him, but he who sent me to baptize with water, he said to me 'He upon whom you see the Spirit descending, and remaining upon him--he it is who baptizes with the Holy Spirit.'

But the Helper--the Holy Spirit whom the Father will send in my Name--he will teach you all things, and will recall to your minds all that I have said to you.

After saying this, he breathed on them, and said: "Receive the Holy Spirit;