This is a great sermon by the Pope, I suggest all Seminarians and to be Seminarians to read it.
Looking at you, I again see proof of how Christ continues to call young disciples and to make them his apostles, thus keeping alive the mission of the Church and the offer of the Gospel to the world. As seminarians you are on the path towards a sacred goal: to continue the mission which Christ received from the Father. Called by him, you have followed his voice and, attracted by his loving gaze, you now advance towards the sacred ministry. Fix your eyes upon him who through his incarnation is the supreme revelation of God to the world and who through his resurrection faithfully fulfills his promise. [Christ, Word incarnate, is the perfect visible image of the invisible God.] Give thanks to him for this sign of favour in which he holds each one of you. [And it really is a high favor and great gift.]
The first reading which we heard shows us Christ as the new and eternal priest who made of himself a perfect offering. The response to the psalm may be aptly applied to him since, at his coming into the world, he said to the Father, “Here I am to do your will” (cf. Ps 39:8). He tried to please him in all things: in his words and actions, along the way or welcoming sinners. His life was one of service and his longing was a constant prayer, placing himself in the name of all before the Father as the first-born son of many brothers and sisters. The author of the Letter to the Hebrews states that, by a single offering, he brought to perfection for all time those of us who are called to share his sonship (cf. Heb 10:14).
Note things in brackets are Father Z's emphasis.