The spiritual master: The Holy Spirit, whom the Father will send in my name, will teach you all things

Jesus during the last supper reminded the disciples that the Lord would send them a spiritual teacher after his departure to the Father's house. This is the promise of the Christian Pentecost, and with this event would come the birth of the Church.
With this, Jesus is explaining to us that the Kingdom of Heaven is more than a doctrine of knowledge, it is also the decisive action of the third person of the Holy Trinity. Just as the old testament was the time of the Father; with Pentecost, according to Christian theology, the time of the Holy Spirit began, that is why Jesus explained: "And so I tell you, every kind of sin and slander can be forgiven, but blasphemy against the Spirit will not be forgiven" Matthew 12:31.
Our Lord Jesus loved his disciples with good love (Agape) and did not want them to forget his perfect and eternal word, because everything begins with the word, that is, the wisdom inspired in the heart of man, that is why he said to them: "Anyone who loves me will obey my teaching. My Father will love them, and we will come to them and make our home with them" John 14:23.
The holy spirit represents the spiritual guide and the inner master in the teachings of Jesus:
"But the Advocate, the Holy Spirit, whom the Father will send in my name, will teach you all things and will remind you of everything I have said to you" John 14:26.
And also by this mighty spirit, we receive the spiritual gifts of faith, hope, and justification to grow in the word of God; and by the same spirit, when the word matures in the heart, we receive the seven gifts of the holy spirit: "Because the Holy Spirit had not yet come on any of them; they had simply been baptized in the name of the Lord Jesus. Then Peter and John placed their hands on them, and they received the Holy Spirit" Acts 8:16-17.

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