Everything Jesus said and did was by His HolySpiritFather Joh 14:10.
Jesus prayed that we would be one with His HolySpirit Joh 17:11.
The Disciples did not receive the HolySpirit immediately. Acts 2:1-4
Jesus breathed upon them as a sign that the HolySpirit would be invisble and would be the breath of spiritual life in us empowering us to go out into the world with the Gospel.