The first words Jesus speaks in the Gospel of Mark set the tone for the entire Gospel and, one could say, for the whole of Christianity: “This is the time of fulfillment. The Kingdom of God is at hand. Reform your lives and believe in the Good News.”
By noting “the time of fulfillment,” Jesus is referring to something humans have been longing for, hoping to see arrive. It’s as if he’s saying, “The privileged time is here.” These words provide a sort of wake-up call, a warning bell in the night. They’re similar to what worshipers hear repeatedly in the Byzantine liturgy: “Be attentive! Let us be attentive!”
But how should we be attentive? Jesus is eminently clear: “Reform your lives and believe in the Good News.” The Greek word for “reform” is metanoiete, a term derived from two words, meta (beyond) and nous (mind). Thus in its most basic form it means something like “go beyond the mind that you have.”
Jesus is commanding a change that takes place at a an elemental and all-embracing level of one’s being. He’s telling his listeners to change the way they see, the way they think, the way they imagine.
Change your attitude. Change your perspective. Change your angle, your mode of vision.
The new state of affairs has arrived, but you are not going to see it unless you change. Today, go beyond your mind and see through the eyes of Christ.
– Father Robert Barron