The Holy Spirit Our Interior Teacher!
My dear young friends, the Holy Spirit continues today to act with power in the Church, and the fruits of the Spirit are abundant in the measure in which we are ready to open up to this power that makes all things new. For this reason it is important that each one of us know the Spirit, establish a relationship with Him and allow ourselves to be guided by Him. However, at this point a question naturally arises: who is the Holy Spirit for me? It is a fact that for many Christians He is still the “great unknown”. This is why, as we prepare for the next World Youth Day, I wanted to invite you to come to know the Holy Spirit more deeply at a personal level. In our profession of faith we proclaim: “I believe in the Holy Spirit, the Lord and giver of life, who proceeds from the Father and the Son” (Nicene-Constantinopolitan Creed). Yes, the Holy Spirit, the Spirit of the love of the Father and of the Son, is the Source of life that makes us holy, “because God's love has been poured into our hearts through the Holy Spirit which has been given to us” (Rom 5:5). Nevertheless, it is not enough to know the Spirit; we must welcome Him as the guide of our souls, as the “Teacher of the interior life” who introduces us to the Mystery of the Trinity, because He alone can open us up to faith and allow us to live it each day to the full. The Spirit impels us forward towards others, enkindles in us the fire of love, makes us missionaries of God’s charity.
I know very well that you young people hold in your hearts great appreciation and love for Jesus, and that you desire to meet Him and speak with Him. Indeed, remember that it is precisely the presence of the Spirit within us that confirms, constitutes and builds our person on the very Person of Jesus crucified and risen. So let us become familiar with the Holy Spirit in order to be familiar with Jesus.
Pope Benedict XVI - World Youth Day Message XXIII World Youth Day, 2008