"And I will ask the Father, and he will give you another Helper, to be with you forever, even the Spirit of truth, whom the world cannot receive, because it neither sees him nor knows him. You know him, for he dwells with you and will be in you. 'I will not leave you as orphans; I will come to you. Yet a little while and the world will see me no more, but you will see me. Because I live, you also will live. In that day you will know that I am in my Father, and you in me, and I in you. Whoever has my commandments and keeps them, he it is who loves me. And he who loves me will be loved by my Father, and I will love him and manifest myself to him.' Judas (not Iscariot) said to him, 'Lord, how is it that you will manifest yourself to us, and not to the world?' " - John 14:16-22 ESV
Judas (not Iscariot) asks a great question here and I have read the chapter several times looking for an answer and Jesus answers the question in a very indirect way.
"Jesus answered him, 'If anyone loves me, he will keep my word, and my Father will love him, and we will come to him and make our home with him. Whoever does not love me does not keep my words. And the word that you hear is not mine but the Father's who sent me. 'These things I have spoken to you while I am still with you. But the Helper, the Holy Spirit, whom the Father will send in my name, he will teach you all things and bring to your remembrance all that I have said to you. Peace I leave with you; my peace I give to you. Not as the world gives do I give to you. Let not your hearts be troubled, neither let them be afraid.' " - John 14:23-27 ESV
Words. The Spirit of God is the Spirit of truth. Jesus came to bring the Fathers words. We are born from seed that is made of words. We are the product of words.
"Long ago, at many times and in many ways, God spoke to our fathers by the prophets, but in these last days he has spoken to us by his Son, whom he appointed the heir of all things, through whom also he created the world. He is the radiance of the glory of God and the exact imprint of his nature, and he upholds the universe by the word of his power." - Hebrews 1:1-3a ESV
Jesus' words won't stick to the world. They won't be retained. Our natural man has no use for God's words. Naturally speaking we are filled with our own words.
Our helper, advocate, coach and teacher is going to help us with words and those words have power. The world was created with words. Words can heal. Words are keys that lock and open doors. When the word is in us a home is created for the Father to live in us. God's words and His peace go hand in hand.
Every decision we make that is based on a word the God has spoken has eternal impact. It isn't memorization issue. It is a internalization issue.
"Your words were found, and I ate them, and your words became to me a joy and the delight of my heart, for I am called by your name, O LORD, God of hosts." - Jeremiah 15:16 ESV
God's word is linked to His manifestation and His manifestation is linked to His word. His words are His person manifested objectively in the world. When we quote the Father He Is in the room with us and there is a conversation that Heaven is participating in.