The Breath of the Resurrected Christ is the Spirit
John 20:21 Then Jesus said to them again, Peace be to you; as the Father has sent Me, I also send you. (22) And when He had said this, He breathed into them and said to them, Receive the Holy Spirit.
The Lord said that just as the Father sent Him, so He would send us in the same way. The Father sent the Son by being in the Son. The Father’s life, nature, presence, and the Father Himself came with Him. In the same way, the Son now sends us. He sends us with His life, His nature, and His presence. As the Father sent the Son by being one with the Son and by being within the Son, so in the same way the Son sends us by being one with us and by being within us.
The way the Lord sends us is by breathing the Holy Spirit into us. This was why, immediately after saying, “I also send you,” He breathed the Holy Spirit into them. By His breathing, He entered as the Spirit into the disciples to abide in them forever. Hence, wherever His disciples are sent, He is always with them. He is one with them. As we shall see, to breathe the Holy Spirit into us means that the Lord breathes Himself into us. The Lord sends us by being within us. The only way that the Lord can be one with us and be within us is by breathing Himself into us. Therefore, we must receive the Spirit, which is the reality of Christ. In other words, this simply means that we have received Christ Himself.