Mark's Gospel for the First Sunday in Lent is short but very important. Jesus must have told his disciples about being tempted in the desert.
"The Spirit drove Jesus out into the desert, and he remained in the desert for forty days, tempted by Satan. He was among wild beasts, and the angels ministered to him. After John had been arrested, Jesus came to Galilee proclaiming the gospel of God: "This is the time of fulfillment. The Kingdom of God is at hand. Repent, and believe in the Gospel." Mark 1:12-15
I think this gives us plenty to reflect upon today. May our forty days of Lent help us to proclaim the Kingdom of God.